In the for what it's worth department...
One day, not too long ago, while reading an interesting and useful post, I got an idea (those don't come along too often). I copy the entire individual post (not the entire thread for obvious reasons) that contains the information (including Subject, Posted by, and Date), paste it into and e-mail and send it to myself.
Then, I print out a hard copy of that e-mail, punch three holes in it and put in a 3-ring binder with tabs, according to the subject. It has proven to be a valuable reference resource!