Well, this is an easy one. First of all, edge and stop technique always counts. So, don't start and finish in a minute, take your time.
I start by looking at porn and reading stories here. By the time I tease myself, I play with my cock but mostly with my pants on. After that, I take some lube, it can be anything (your spit is always good).
I use go-stop-go technique and raise my tension.
Then put more lube to my hand, and put my hand against a wall or on my stomach as high as my belly. My hand is backwards so there is a ring of my index finger and thumb and my hand's back is against wall.
I put my erect penis into this room and start pumping. So it's like masturbating with your hand, but instead of moving your hand, move your whole body.