Mocks aren't the best representation of what an auction will actually be like, but I'd still do one on whatever site your league is run on, just so you have some idea of what you're getting into, and what your team will look like. Just expect 75% or more of the 'people' in your mock to be computers/autopickers.
My auction strategy is typically to go cheap at tight end and QB. I'd rather get a Jay Cutler or Tony Romo for a few dollars than Peyton for big money. Same with tight end. Whereas in a redraft, I might take Graham in round 1, in an auction, I'd rather save that extra money to load up on elite RBs and WRs, then get some cheap tight ends for a dollar, maybe pair up a Martellus Bennett and a Travis Kelce.
