A rough draft would contain a lot of the following type of lines:

#GGG Add error-checking here.

#GGG When in production, this line changes to $foo=2;
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'GGG' is just a character string that allows me to search for it and find all my to-do notes.

Also, a rough draft doesn't have good comments. It doesn't have a lot of error-checking (though you should build it in as you go.) It probably also isn't factored very well.

What a rough draft does have is good variable names. Changing variable names in mid-stream is a pain in the ass. Get your names right. If you can't name a variable neatly and succinctly, that's a clue that you don't understand what you're doing.

(The above paragraph goes doubly for function names.)

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/me wants to be the brightest bulb in the chandelier!

Vote paco for President!