With over 50 years of experience playing with myself, here's one that adds some great variety, namely dusting on some cornstarch on your manhood before starting to stroke slowly. If you only grasp lightly or simply use your hand curved open with no grasp, your hand will glide smoothly for a very tactile surface touch! It's not at all like grabbing on tightly and pumping hard so the excitement is transferred to the inside of your manhood. Cornstarch and a very light touch make the outside surface of your shaft tingly and since I like to prolong my erection as long as I can before grabbing and pumping to ejaculation, this suits my style occasionally. I don't use it often, but like it when I do! Gotta go. Have fun!
[Webmaster's note: By the way, if you have never played with cornstarch mixed with water, your missing out! It's not sexual, but it's very cool- It'll be a liquid in your hand and a solid on a plate or a counter top.]