Answering other people's questions is a great way to increase your own understanding. It forces you to think about just why something isn't working.
Here are the topics that started yesterday but don't have an answer yet. There are a few false hits in there but it's pretty close!
How to post code in this forum.
It's especially helpful if we take the time to research the exercise, the code syntax and usage, and best practice, then infuse our answer with insight. Both parties learn new things this way.