If you are going to use a Delta Sky Club, go to the one on the main concourse if possible. They have a better layout and a few more selections of refreshments.
If Delta messes up your flight- complain at the help line. They gave me $12 worth of vouchers which I used on scotch. Negetive Nancy no more. Now a Tipsy Gypsy;)
I laugh at all the cheapskates who complain about no free wifi. Do you share your wifi with your neighbors? It costs tons of cash to implement wifi at an airport. Get over it!