Actually, a lot of my wardrobe is machine washable. Sure, it may say "dry clean only", but I know that a lot of garments labled thusly can be put in the washer on a cool & gentle cycle.

The other useful things are those Dryel home drycleaning kits. The bottle of stain remover from those has helped me remove gel pen ink from bridal satin, sunblock stains from black blouses, and coffee or tea stains from everything.