When you spend time to find & fix all the bugs in your project, you can't complete the project in your life time.
- Anonymous - Ignore some bugs
 
One of the most effective guidelines is not to get stuck on a single approach. If writing the program in PDL isn't working, make a picture. Write it in English. Write a short test program. Try a completely different approach. Think of a brute-force solution. Keep outlining and sketching with your pencil, and your brain will follow. If all else fails, walk away from the problem. Literally go for a walk, or think about something else before returning to the problem. If you've given it your best and are getting nowhere, putting it out of your mind for a time often produces results more quickly than sheer persistence can.
- Steve C McConnell, Code Complete: A Practical Handbook of Software Construction by Steve C McConnell , ISBN: 1556154844
 
The sooner you fall behind, the more time you have to catch up.
- Anonymous - Ogden's Law