Alrighty, I think I can throw down a few tips.
Don't use a buffer unless you know exactly what your doing. Usually people end up pushing too hard on the buffer, thus creating the swirls :P
Part of my job is to wax exotic cars, so just trust me :P
I do 1 section of the car at a time (ex: front left fender, left door, left back panel) and I just work my way around the car. Go get some TerryCloth towels (which is what i use) that way the towels don't scratch your car. When you do do the circular motions, keep it consistant. I stick to clockwise because I feel that is how the basic car's paint flow is. The circular motions is to get the wax into each and every little thing, where as just going side to side will miss the swirls going up and down, catch my drift?
Keep everything consistant on what you do. Crank some tunes and have someone to keep company
Anyways.. I have found that the products must be consistant as well. Buy some Mothers, Turtle Wax, etc. but make sure it is a name brand (just preference. I prefer Mothers)
Our current wax setup is a 4-step wax. What will help ALOT with those swirls, and should be done before any wax job that you do, is to get a claybar and follow the instructions on that. The claybar is TINY so it will take a while, but there is liquids that you can get that you apply just like wax. Wash your car, pull it in the garage (or some form of shade) and have a blast man. Just know it takes about half a day to a day to do a complete job on detailing a car if your alone and don't know what your doing :P
I wrote this in a rush, bout to go get some dinner and meet up with a couple people, so I will come back and revise anything that I missed or wrote incorrectly, along with the product line that I use (which works wonders)