Guys guys guys... you park far away and your car is more likely to be broken into so they can steal your stuff.
Dings are a fact of life with a car. You can't avoid them.
The solution for these small ones is usually PDR (paintless dent removal)... with the exception of DarkSoldier555 who sounds like he want to a fly-by-night operation.
www.dentwizard.com has a list of PDR bodyshops.
In the US, this works out to something like $70 per ding, often with a deal like 1st one for $70, all others $30. They don't need to repaint and the process usually takes less than an hour. Sometimes there will be some paint damage where the door of the other car hit yours, but usually a lil buffing takes it out.
The tools that the PDR shops use are a lot more advanced than those DingKing kits you see in store, so don't expect to get the same results with a $50 as-seen-on-tv product.