http://www.engineyard.com/blog/2009/the-art-of-library/

Honk if you love hacking! I know I do, and boy is it ever satisfying to turn a tough problem into a clever solution. But as you tumble down the slippery hacking slopes, picking up loose bits of code, you may find the itch to start writing code for other hackers. Good thought, but realize that implementation is just the tip of the iceberg.