wordle.net, which makes a graphic out of any entered text. Words that are used frequently show up larger in the graphic.
All of the entries from this year's blog generated the attached word cloud. The size of 'house' doesn't surprise me, but it seems I use 'little' and 'back' a lot. I assume it's phrases like "I want to go back to my little house" which drive the usage.
It's a fun website, there's a surprising amount you can do in terms of fonts and layouts of your text.