For the new/aspiring developers:
1. If you are still looking to learn more, but you don't know where to go, start brainstorming. Make a list of projects you could make and sort them by difficulty. Put the ones you could do now at the top of the list, and the ones you aren't sure how to do yet, at the bottom of the list. As you go through them, if you want to do something but aren't sure how, just hop onto an irc chat and everyone will be glad to help. As you go through the projects, your logic and program design skills should improve, as well as your knowledge of programming.
2. Put comments in your code. Seriously. If you are working on a project and suddenly stop working on it for a week or more, you will go back to look at that code and be extremely confused. If you are making something open source, its even more important. If people can understand the code, they are more likely to contribute to it.
3. Try not to focus on code for too long. The longer you work, the more tired your brain gets. Eventually you get tired and make really stupid decisions in your code.
4. Don't code while tired (look at #3)
5. If you are writing code as an assignment, make sure to rename all variables to proper names before submitting it. The instructor will likely not be pleased to see variable names with the f-bomb in them.