This works most of the time. It's actually pretty easy. First of all, be sure to take the test in the car you are the most used to.
so, it's easy to parallel park.
First, pull up to the car so your front bumper is aligned with their mirror. Now turn the wheel all the way to the right and start backing up slowly.
Look to the rear left side of your car and back up until your rear bumper is closer to the curb than the car in back of your's car.
Now turn all the way to the left and pull her in. Watch the car in front that you don't hit it. and have some faith. If you are taking the test, back in veeerrry slowly and if you hit the curb, pretend like it was the brake, then turn in and try your hardest to straighten it up. You only get one chance to manuever it right.