Because you don’t need to do the same thing all the time…
Tune into your body
Nix the porn every now and again and pay attention to your body. Notice changes in your breathing, which muscles tense and which relax and how you feel just before and just after orgasm. All of this is useful information that teaches you about your sexual responses.
Switch hands or change position
If you always use the same hand and the same strokes try switching for a bit; or if you normally masturbate in one position, try something new. It may take a little time to find the right rhythm but it should feel different, and different is good.
Move those hips
Try simulating the thrusting you do during sex. Instead of using your hands to move up and down the shaft, let your hips do the work.
An intense up and down stroke is the standard way guys achieve a self-induced orgasm, but it’s ain’t the only way to go about it – try rolling your penis in between your hands while moving them up and down your shaft or use long twisting strokes. Try different pressures and speeds as well.
Use your forefinger and thumb to make a circle at the top of your balls and gently tug as you masturbate. This can prevent you from ejaculating to extend sexual feelings in your body.
Don’t neglect the rest of your genitals
Try massaging the perineum – the area between the balls and the anus. This results in external prostate stimulation. You could also try using a finger to explore the anus.
Use a lube
A good lube makes everything nice and slippy. An oil-based lube is fine for masturbation, but you need a water based one for sex with a condom.
Consider using a vibe, dildo, butt plug, cock ring or cock sleeve. As women have discovered, a good sex toy can add great intensity and pleasure to masturbation.