I've waxed mine a few times with Mcguires cleaning wax. Just the outer lid (VERY VERY MILD pressure). Place the padding sheet between LCD and keyboard before you start. I also wax the palm rest on both sides of the touchpad. It doesn't really get much more shiny, but I feel better about oils and contaminates not ruining the clear coat. Also, I know there is wear going on around the palm rest and I prefer to slow this down as much as possible. Do a little area at a time.
DO NOT wax the bottom of the laptop or any of the black areas under the lid.
If you want to clean the black part of the outer lid I've noticed that Armor-All works well, but will get slippery if you use more than just a dab to prevent UV damage. Make absolutely sure you remove ALL the excess.
Clean the LCD screen with half/half distilled water and the highest percentage of alcohol you can find. Labs get like 99.9% from special distributors if you can find some. Otherwise the 92-96% stuff will work just fine. Mix your own, it's cheaper. Just don't use any kind of window cleaner.
The keyboard can be cleaned with the same solution, just get the cloth BARELY damp and use light pressure. DO NOT SPRAY the keyboard or the vent grill above the keyboard. DO NOT SPRAY anything on the underside of your laptop.
The number one absolute best thing you can do to keep your lappy happy is use canned air on all your vents and fans on a regular basis. If you forget or don't feel like doing any of this stuff I mentioned, PLEASE make an exception for blowing out the vents on a regular basis.
Sorry for the CAPS, but I can't stress enough how careful you need to be about those specific things mentioned. I've been doing this stuff about once a week for the last 2 months and my A51m still looks brand new. Up to you as far as you wanna go with it. This not the exhaustive "be all and end all" care list, so anymore suggestions are still very welcome.