-always trim the hair short prior to shaving using an electric clipper.
-take a warm bath prior to shaving.
-use shaving cream, or shave in a tub filled with warm water.
-shave once with the grain to remove the bulk of the hair, and then once against the grain to smooth it out. Don't shave any area more than twice to reduce your chances or razor burn.
-i recommend a gillette mach 3 turbo; they work great for this!
-use a new blade each time.
Wait atleast 3-4 days after shaving prior to shaving again to reduce razor burn, ingrown hairs and other problems.
-use talcom powder after shaving to reduce the itching.
-don't use after shave.