Next time you need some procrastination, check out the "crayon physics" -style java game Magic Pen. Your goal on every level is to get a circle (or sometimes a square) to move to touch a flag. You do this via drawing simple physics-type tools. The one thing it's lacking is a pause button, that would really help.
If you ever get stuck on a level, you can skip it via the menu, but you cannot submit your "score" (number of shapes used) until you beat all levels. Once you beat all 25 levels (took me a full day of procrastination), go back and see how many different ways you can solve the same level. After a bit you'll build up a mental "toolbox" of different techniques for each level, and you can go back and see how to force a square peg into a round hole.