How to lift a car without a jack! In this video, I made a homemade car ramp with 2x4 lumber to do a self oil change. It's a very easy and lowcost project that you can make one for your garage.
Depending on your vehicle, you can make it higher so you get more spaces or longer so it's easier to drive up on the ramp.

Warning*
Use it at your own risk!
Don't forget the sidebrakes and parking gear!