I wish I had the chance to go back to Greece again and to see more of England. While I'm in England, it would be nice to see Ireland and Scotland to boot.
It would be fun to spend at least a month in each place I go (roughly 5 months including travel time). Getting to explore a specific region more in detail.
I hear CouchSurfing.com is a website to find inexpensive lodging. Granted, I've never tried this website nor do I know how "safe" it is. Though a couple people (indirectly) greatly recommended using this site for one reason or another. Also, I dont know if it's limited to one continent or if its international.