Grip removal: Use an air compressor with a blow gun to remove MTB or BMX grips without destroying them. Works best if you have a blow gun with a long nozzle.

Brake adjustment: For setting v brakes and u brakes without a third hand tool use a woodworking clamp to lock the brake pads against the rim. Insert thin cardboard scraps as shims between the brake pad and the rim if you want to create a perfect fit the first time. The $3 clamp/spreaders with the nylon covers that Harbor Freight often gives away work really great for this.