Fuel filter is supposed to be changed at 75k according to the dealership I went to. Cleaning your throttle body can never hurt, maybe make yourself an oil catch can. I had to get new front shocks on my 06 because they were leaking and I could tell my rears were wearing out also. I had about the same mileage as you.
2006 Red Chevy Cobalt LT
mods: Kenwood DNX5140 Head Unit, HIDs, Halo headlights, LED taillights, Injen CAI, LSJ throttle body, 2.4L intake manifold, red interior LED's, TWM short shifter, custom fit red seat covers, red trim and door handles, SS gauge cluster, Racing Solution long tube header/downpipe, Corsa touring exhaust, lightweight crank and alternator pulleys, trifecta tune, 17" Motegi black rims