Parking in your garage isn't the hardest skill to learn, but some days are better than others. If you're tired of knocking over the rubbish bin, pulling in too far, or whatever, Instructables user wilgubeast has a clever solution to help you park perfectly every time.
The problem with parking in a garage is you don't always know how far to pull in. What you can do to solve this problem is attach a tennis ball to some string and hang it from the garage ceiling at a point where it will touch your car's windshield. That point should be at the exact spot you want to pull in when parking. This way you'll always know how far to go and never pull in too deep. (TWSS.) For more detailed instructions (and a bigger picture!), check out the full post over at Instructables.
Garage Penetration Indicator [Instructables]