Find a seedling or pup to use as the scion. Find a suitable rootstock for your scion.
Sterilize a razor with alcohol and a flame. Make sure your hands are clean.
Take the root stock and slice the top off. If it is a ribbed stock cut the ribs at an angle to prevent cupping after it dries out. Take the chosen seedling and slice off a good portion of the top. Place the seedling onto the stock and match up the vascular bundle with that of the seedling.