An important tip for installing roofing shingles is to be safe. Wear protective gear, especially nonstick boots. It is also important to have a ladder of the appropriate height and to make tools accessible without too much bending over.
Another important tip is that shingles can be installed over other shingles, as long as the old shingles do not have sufficient damage or mold. Otherwise, remove them first. To strip the roof, the best tool to use is a roofer's spade. Shingling a roof is not a difficult process, but consider the starting roofing materials. An additional protection of underlayment may be needed to prevent water damage to the new shingles.