Cal Newport blogs about writing down what you learned so all that studying doesn't go to waste.
I've been having exactly the same thoughts lately. I moved my website to siteground.com because they claim to make it easy to install and use MediaWiki, the wiki software used by Wikipedia. I suppose I could have used something free like pbwiki, but pbwiki uses proprietary software. I want to have control of my data and be able to back it up and move it to other servers if necessary.