I try to subscribe to security and release announcement RSS feeds in Google Reader since it's bad practice to let software become out of date, especially on a web server. At the very least you'll know of a vulnerability and be able to patch it. Here are some important ones I use:
Having recently started development with Android, I noticed that the emulator takes ages to load up initially. My original thought was that testing a change would take a very long time. However, this is not the case. If you launch an emulator from the Eclipse SDK, you must remember not to close the emulator window. When you make changes and relaunch the application your changes will automatically be installed on the existing emulator. This is something that wasn't completely obvious to me when I started.
I feel starting out as a person who makes websites today is different than it was 12 years ago when I started. Back then I had literally no guide and I was a middle school student. Somehow, I pulled through and that experience is an interesting thing to look at now that I'm a little older. Compared to some I am still a beginning web developer, but I now do it professionally and make a living with it.
Here is a list of things I'd recommend to anyone starting out on the path of web development.