I am in need of finding the best keywords for my forum on google adwords, does anybody have any good sites/tools i should use?
Thanks in advance,
If you are using Google Adwords, you are already using one of the best tools available (it should give you an idea what words are most sought, clicked-through, etc.). All other services offer very rough approximations.
From the other side, you could also consider creating an AdSense account and bidding for many of the keywords you are considering. After a few months (a year? etc. depends on your budget), you should have a very good idea what terms are most sought and clicked through.