Well my number one must do tip has to be to keep a copy of your travel journals and diaries online because your not travelling hard enough if you don't lose or damage your paper copies. I'm upset...yet proud enough to be on version 3 of my hand held jobby....the last one left in the back of a cab during a race across town for a flight. Managed to fill in the gaps though becuase of the online copy.
There are a few specialised web services for this...by far the best one I've found (not just because it's free) is www.travelpackers.com
You can even see me if you type in my username 'Smasher'.
Go your own way peoples. :P