If you're frugal-minded, doing your own oil changes is a very good way to save some bucks. Just make sure that when you take off the old filter, the gasket comes off with it.
So that the new filter will seal correctly.
So that when you start the vehicle, it doesn't vomit out darn near all of its oil all over your driveway.
So that you don't have to go back to the auto parts store and buy another 5-qt. jug of oil and a bucket of "oil dry", more than doubling the cost of the oil change.
On a different note...