Suggestions?

I have a question for all of you reading this.

I have a project that I want to do over the course of 2011. Every month, I will learn something new and at the end of each month, I will make a video doing that thing that I was supposed to have learned. I think I've made a post talking about this before, but there weren't very many of you then.

My question is:

What is something that you know how to do that you think would be cool for someone else to learn?

I'm pretty open when it comes to suggestions, but I do need to narrow down my list to twelve things. Suggest as many as you want! The more options, the merrier!

Thanks for your help (again)!

--Jude