I'm going to assume I don't have access to a farm with pigs, large quantities of chemicals or an incinerator.
Sticking it in the bath tub and draining blood, fluids etc.. would be the first step - wash down with lots of hot water, bleach... lots more bleach, soda suds, more bleach and hot water... I then turn the oven on/clear out my freeze - I think this whole process could take couple of days or so but basically I'd cut out all flesh/organs and overcook/burn them to a crisp in the oven (some of the 'meat' would have to be bagged and stuck in the fridge or freezer temporarily and the oven running 24/7 for the 2-3 days. Probably worth re-freezing the cooked/burnt meat - then just throw in the trash/dispose of over the next month with the regular kitchen rubbish.
Hair can be burned, teeth - get a hammer, smash them to pieces, grind up the pieces until they're not recognisable as teeth... go throw in a river somewhere... ditto to the bones... cook/burn in oven then saw them into very small pieces until they're barely recognisable even if stumbled upon - throw small pieces into river(s), over several trips.