Now that's a question I can talk about for hours
. First and foremost the key to your car looking it's best is keeping swirl marks off the paint. Do that by washing properly with thee 3 bucket method and use only name brand, high quality microfiber towels on the paint. If the paint feels rough to the touch then you should use a clay kit to remove the bonded contaminants, follow that with the cleaner wax that comes in the kit, and then finally use the wax of your choice for protection. Just keep in mind that 98% of the appearance of the paint is due to the flatness and cleanliness of the paint - wax adds that extra 2% and protection from the elements.
Let me know if you'd like I can email you the handouts we give to our clients after correcting their paint.
Check out the gallery on our website where you can see before/after pictures and explanations as to what we did to get the results:
http://www.infinitedetail.net/Gallery.php
Most importantly, have fun doing it :D