HELP!!!Condensation is ruining my life!!!!!!!!

Here in the Land Of Lincoln, spring is in the air, and with it, moisture. Everything in my garage is covered with moisture. There are beads of water standing on the floor...and that's with the door open all day and fans running. Naturally, everything unpainted is covered with rust like a mossy rock. I'm sure some of you deal with the same problem and have come up with creative solutions. What works best...dehumidifiers, roof vents, attic fans? I'm getting desperate, as all the work I did last fall is getting ruined.