Photomanipulation of people in unlikely situations may cause some highly amusing results.

Adding rocks to a concrete corridor doesn't quite achieve the most scenic appearance...neither is bobbing your head up and down in exorbitant amounts.

If you ask someone to do something, please take your time to explain things carefully and thoroughly.  Otherwise, they might spend an exorbitant time making something for you only to find out that you suck at explanations.

Feeling creative?  Not wanting to do your homework?  Go for it!  Or at least start on that creative thing.  If you don't at least start on it, you'll feel regret later on when you're in a creative slump.

Sometimes, less is more, especially when it concerns t-shirt designs that you want people to wear in public.  Compromise is the best solution to have a cluttered, clunky design.