Programmers should avoid several pitfalls that can lead to poor code quality, including: 1) Coding merely for money without enjoying programming can result in low-quality code that makes one's career and teammates miserable. 2) Not having basic programming concepts leads to code that is poorly designed and unreadable. 3) Trying to be too smart by writing complex statements that combine too many steps results in code that is difficult to read and change. 4) Using new skills prematurely without ensuring they are relevant can also hurt code quality. 5) Taking on too many objectives like performance, memory use, and reliability can result in overcomplicated code that takes longer to develop.