Clean obvious obstructions such as newspaper, leaves, etc. from around the exterior of the unit.
As a final check when taping drywall joints, use a side light to check for smoothness. The light can be a halogen worklight, a troublelight, a lamp without a shade, even a larger flashlight. Hold the light close to the wall next to the joints in several places to reveal high and low spots, or bumps and depressions, that otherwise would be easily missed.
When purchasing carpeting, you should buy the best-quality carpet you can afford, coupled with the highest quality padding. In fact, the padding that goes between the carpeting and the subflooring is as important as the choice of carpeting itself. Padding provides softness and support, cuts down on noise and insulates the floor. Often referred to as "underlay" or "cushion," padding thickness depends on the pile of the carpet above it. Padding should be no thicker than 7/16 inch, even for a very deep pile carpet. Too much cushion can actually void a manufacturer's warranty; so, take the time to find the padding that is right for your new carpet.