What really gets me off on occasion I get a long solo session is to have a picture of a woman in a short/skirt dress with nice legs and a video clip or two of a close-up of a woman giving a blowjob and another video clip of a woman usually riding a guy cowgirl or reverse cowgirl. I really get turned on imagining that I am both of them. Kind of kinky and crazy I know but it really turns me on during those occasions when I am going solo and have the time
Often I just listen to my body and follow what it's feeling. I get turned on by weird little things sometimes. Fantasizing, porn, and erotica are also good Oh and dancing sexily and putting on lingerie's great!