keep a folder of files of code (and even better if that code is also implemented as being a playable~testable game) that works (your own code, all the library files on this site ~ hehe, and code given in the forum's posts by people ~ hehe)

USE A LOT of comments (the: ' // your comments ' ) in your Scripting code blocks, as you'd be surprise how easy it is to forget (how to do) things over time... ~ "a pinch of prevention is worth a pound of treatment~cure" (or however the saying goes, lol) ...

[HK Edit: went off on big tangent, bad when you get social ~ when your mind wanders off, laughs, as it is off-topic content for the post that you get social in, when the post's thread is not a social thread. so I removed it]

also, you may want to use library files (*.aslx) to organize all your game code aspects:

(sometimes it's good to split stuff up as multiple files, such as 'how to guides', and sometimes it's good to have stuff in a single place, aka as a single file for quick reference)

(and you can just copy and paste whatever code from this 'master' library file of yours, into your game file that you're working on)

<library>

  // you can always do more (or less) sub-cateogries as you want for better organization

  <!-- new (default) tree -->

  // the default new game tree:
  <!--
  Objects
    Game
      Verbs
      Commands
    Room
      Player
  Functions
  Timers
  Walkthrough
  Advanced
    Included Libraries
      English.aslx
      Core.aslx
    Templates
    Dynamic Templates
    Object Types
    Javascript
  Filter -> show Library Elements
  -->

  <!-- new (default) game code -->

  <asl version="550">
    <include ref="English.aslx" />
    <include ref="Core.aslx" />
    <game name="xxx">
      <gameid>xxx</gameid>
      <version>1.0</version>
      <firstpublished>2014</firstpublished>
    </game>
    <object name="room">
      <inherit name="editor_room" />
      <object name="player">
        <inherit name="editor_object" />
        <inherit name="editor_player" />
      </object>
    </object>
  </asl>

  <!-- Libraries -->

  // base~general syntax code for libraries, example: <include ref="xxx.aslx" />
  // the default libraries: 'English.aslx' and 'Core.aslx'
  // your library code~tag lines, such as: Pixie's Spell Library, Pixie's Simple Combat Library, Pixie's Clock Library, Pertex' Combat Library, Chase's Wearables Library, Sora's Stackable Library, etc etc etc
  
  <!-- Templates -->

  <!-- Normal Templates -->

  // base~general syntax for a normal template
  // your normal template code lines

  <!--Dynamic Templates -->

  // base~general syntax for a dynamic template
  // your dynamic template code lines

  <!-- Verb Templates -->

  // base~general syntax for a verb template
  // your dynamic template code lines

  <!-- Commands -->

  // base~general syntax for a command
  // your commands

  <!-- Functions -->

  // base~general syntax for a function
  
  <!-- Character Functions (example of optional sub-category usage) -->
  
  // your character functions
  
  <!-- Equipment Functions (example of optional sub-category usage) -->

  // your equipment functions

  <!-- Turnscripts -->

  // base~general syntax for a turnscript
  // your turnscripts

  <!-- Timers -->

  // base~general syntax for a timer
  // your timers

  <!-- Object Types (Types) -->

  // base~general syntax for an Object Type
  // your Object Types

  <!-- Attributes -->

  <!-- String Attributes -->

  // base~general syntax for a string attribute
  // your string attributes

  <!-- Boolean Attributes -->

  // base~general syntax for a boolean attribute
  // your boolean attributes

  <!-- Integer Attributes -->

  // base~general syntax for an integer attribute
  // your integer attributes

  <!-- Double Attributes -->

  // base~general syntax for a double attribute
  // your double attributes

  <!-- Object Attributes -->

  // base~general syntax for an object attribute
  // your object attributes

  <!-- Script Attributes -->

  // base~general syntax for a script attribute
  // your script attributes

  <!-- the special 'changed' Script Attributes -->

  // base~general syntax for a special 'changed' script attribute
  // your 'changed' script attributes

  <!-- List Attributes -->

  <!-- Stringlist Attributes -->

  // base~general syntax for a stringlist attribute
  // your stringlist attributes

  <!-- Objectlist Attributes -->

  // base~general syntax for an objectlist attribute
  // your objectlist attributes

  <!-- Dictionary Attributes -->

  <!-- Stringdictionary Attributes -->

  // base~general syntax for a stringdictionary attribute
  // your stringdictionary attributes

  <!-- Objectdictionary Attributes -->

  // base~general syntax for an objectdictionary attribute
  // your objectdictionary attributes

  <!-- Scriptdictionary Attributes -->

  // base~general syntax for a scriptlist attribute
  // your scriptlist attributes

  <!-- Inherited (Object Types) Attributes -->

  // base~general syntax for an inherited attribute
  // your inherited attributes

  <!-- Objects -->

  <!-- Game Object -->

  // base~general syntax for the Game Object
  // your Game Object code~tag block

  <!-- Player Objects -->

  // base~general syntax for a Player Object
  // your Player Objects code~tag blocks

  <!-- Room Objects -->

  // base~general syntax for a Room Object
  // your Room Objects code~tag blocks

  <!-- Other-Object (non-player non-room) Objects -->

  // base~general syntax for an Other-Object Object
  // your other-object Objects code~tag blocks

  <!-- 'Data' Objects -->

  // base~general syntax for a 'Data' Object
  // your 'data' Objects code~tag blocks

  <!-- Tabs (for creating in the GUI~Editor) -->

  // base~general syntax for each type of tab
  // your tab code~tag blocks

  <!-- Combat System -->

  // mass of code

  <!-- Equipment System -->

  // mass of code

  <!-- Magic System -->

  // mass of code

  <!-- Dialogue System -->

  // mass of code

  <!-- Journal System -->

  // mass of code

  <!-- Storage System -->

  // mass of code

  <!-- Character System -->

  // mass of code

  <!-- 'Pedia' System -->

  // mass of code

  <!-- 'Help' System -->

  // mass of code

  <!-- Event System -->

  // mass of code

  <!-- Item System -->

  // mass of code

  <!-- (Treasure Chest ~ Item Drop) System -->

  // mass of code

  <!-- Game Mechanics (equations, formulas, etc) -->

  // mass of code
  // an example:
  <function name="leveling_function"><![CDATA[
    if (player.experience >= player.level * 100 + 100) {
      player.experience = player.experience - player.level * 100 + 100
      player.level = player.level + 1
      leveling_function
    }
  ]]></function>
  // another example:
  player.physical_damage = critical_function (player) * defending_function (player) * player.weapon.physical_damage + player.weapon.physical_damage * player.strength / 100 - defending_function (enemy) * enemy.armor.physical_defense + enemy.armor.physical_defense * enemy.endurance / 100


  <!-- Game Design Notes -->

  // mass of notes

</library>

enjoy

(and please post your own methods~designs~ideas for organization too (especially the code pros here, if you're willing, hehe).