I am not purchasing an RTW ticket, as I feel as though it is too restrictive. See below for flight deals: I like to check all of these:
Skyscanner – good list of budget airlines
Travel and work abroad programs:
SWAP – for Canadians to a variety of countries. I did this for Ireland and England. The American equivalent is BUNAC.
JET Programme – My life would be completely different if I never did this. I thought I was only going to stay one year, and I ended up staying in Japan for 7 years.