Well first of all, I would make sure you are in tip top shape. I would then immobilise you, attach a feeding tube to your stomach, supplying the proper food and water supply to keep you alive. I would then get a pin and heat it up to a red hot level and pierce your eyes leaving you blind. After pulling out each one of your teeth and finger nails I would then place you in a coffin, with an oxygen tube, and bury you under ground, keeping in mind that the coffin would have holes in it allowing insects to scram and feast upon you as you were keep alive for the longest amount of time.