Depending upon the angle of your driveway, the easiest method is to park in the street w/ the ramps back in the driveway, thus reducing the angle. My driveway is flat, but the enpty lot next to my house allows me to back up and the ramps are almost parallel. You can almost always find a land feature nearby that you can use to reduce the ramp angle. Drainage ditches also work well. Work smarter, not harder.