I've seen this before elsewhere but I kinda like it:
1. Grab the nearest book.
2. Open the book to page 123.
3. Find the fifth sentence.
4. Post the text of the sentence in your journal along with these instructions.
5. Don’t search around and look for the “coolest” book you can find. Do what’s actually next to you
Posts, and rails, and old cautions to trespassers, and backs of mean houses, and patches of wretched vegetation, stared it out of countenance.