You could try changing the order of the moves you already do. Also, pay very close attention to what makes him react how, and play up what he really likes. As an example, I once discovered this one spot on his shaft that he absolutely adored, and tickled the heck out of it with the tip of my tongue for a couple minutes. The effect was fantastic!

Remember to twist as you pull upward. You can also add an element of aggressiveness to it by growling in your throat and holding him down whilst feeding off of him. Don't let him move at all.

Tell him to give it up and take it like a man!

my bf and i really like dominance. (:

he holds my wrists back and kind of uses himself to play with my face. i act like im dying to have him, and he barely holds me out of his reach then slowly acts like he'll let me have a bit. it drives both of us crazy :D

also i do kinda a cork screw thing, while going down i twist my mouth to the sides and it makes him go nuts! lastly i heard getting his shaft really wet along with your hands and taking them and rubbing them up and down quickly really help.

try a combination of no hands and then hands. no hands is sometimes though of to be sexier, although this is more difficult if you cant deep throat yet.

lastly.. try different positions! theres so many and they all (from personal experience) create different feelings. for example, if he's got his legs over you on either side of your chest he can not only 'screw' your boobs but finger you too from behind if hes into that. i also try reverse 69 sorta. have him lay ontop of you in pushup position with his d*ck at your mouth. that way you can use your hands to control if he needs to stop but you can let him control the speed and pace.

good lucckkk!

One other thing....let the anticipation build. Start with some simple kissing, etc and work your way down his entire head, neck, chest and stomach with your mouth. Let the sensations build on each other until he's battling within himself over whether he wants you to just get on with it already or whether he's enjoying the current situation too much to urge you to speed up. Don't let it continue long enough that he gets so frustrated it's counter productive, but building the desire most definitely has great effects.

One big thing that my gf never forgets to do is do something with my balls the entire time. Once she kept teasing them and tickling them and that drove me wild

How Do I Get Him/Her to Orgasm From a Hand/Blow Job?

"Playing Ball" and How To Tips for Prostate Massage
This is also an excellent tutorial for people interested in and concerned about the how-to of Anal stimulation as well as play.

I'm including the second link because of the information it contains regarding fondling the scrotum and testicles.