Gloved Hand
When I am alone in the house and want to have an extended masturbation session, I like to watch porn to get really turned on, and I like to 'edge' several times. I use just enough lube (Astroglide) to make my cock slippery. To get a different sensation (almost like it's someone elses hand doing you) I will frequently use a thin latex glove (like the kind nurses/doctors use). Not only does it feel like it's not you doing the stroking, it is less sensitive, so you can last longer (a bit like using a condom during PIV sex). The lube lasts longer too since it doesn't get absorbed by your hand. I usually have several orgasms and the added accumulation of each squirt of cum really feels good as further lube.