The pen tool: if you learn to use it correctly, you'll love it.
Here's a few projects to practice your skills.
Pen Tool Cup: learning the tool
Pen Tool Parrot, a short project using the pen tool.
Text Portrait: a major project in which you will be creating a work of art.
Da Font is a great site for fonts. It's a bit bulky to go through, but once you find a font you like, you are able to type out a word or phrase to see if you really want to use it before downloading it. I've downloaded a few from this site, but I've also just used it for taking a screenshot of the word or phrase I'm going to use, if it's just a one-time thing.
Showcase your own work on Pinterest! Not only is it a place to look at the work of others, let others look at yours! Here's just one of my own boards, where I collect works for inspiration:
http://pinterest.com/3CraftySisters/designing-with-ink/
Photoshop can be a great help when it comes to designing off-computer. The second picture is a mosaic I created over the summer. The first is the design I created to follow. Of course, the design was created in Photoshop.