What is a great way to remember how to script

Question

I keep forgetting what stuff does every now and then. at one point I got so good I was going to make tutorials for beginners but now I'm back to mediocre scripting level.

Answer 1

'Comments in Code as Documentation'

-- SomeCode.lua -- Version: 0.01 -- Author: Code R. -- Date: --:--:--
--[[ I put out and return the String: Lua
     Example: lua SomeCode.lua
]]
local str = _VERSION:sub(1, 3) -- Method sub(1, 3) on String _VERSION
print(str)
return(str)

Than other People have a chance to understand whatfore this is too.

EDIT
I love REXX
A REXX Script has to be start with a Comment /* I am REXX Code */
Thats a Coercion thats makes Sense and even it is easy to use say(sourceline([number])) to put it out as a minimalistic: HELP!