1. Learn to read and understand the errors and exception messages. While writing code you're going to be facing exceptions most of the time and the real cause of them is under a lot of generic error messages. That and a lot of patience and perseverance.

2. You're going to face clients and bosses that ask you to do a temporary "workaround" even though you know there is a best way to solve a problem even if it takes more time and effort. Don't "crash" against their ideas, try to find a mid-term between the fast and easy work around and the best solution and leave it open to improve it in the future. I have met a lot of developers that let the frustration stops them to be creative just because the approved development is not what they wanted to do.