Should have been a bit less cheeky with a new member.
Welcome to Flyertalk,
corplinx!
I guess my advice above was really just to read all of the forums. Truth be told, most websites just pick and choose offers that are found on Flyertalk (or which can be otherwise found on Flyertalk -- that is, members have found them on other websites and then posted them here).
There is no substitute for the wealth of information that one can find in this amazing community!
And noone's filter will really be as good as your own, for your own personal needs.
Get to know your preferred airline's forum, and your preferred hotel forum, and check the
S.P.A.M. board for unique ways to earn miles and
this forum for the most screaming offers around.
That's not ALL you need to do to nab as many miles as possible, of course, because you might miss out on things like Northwest's current Fly Free Faster 3 promotion. But it's a good start.
And then pretty soon you'll be reading ALL of the forums and racking up a 7 figure mileage balance like the rest of us!