with a hj use lube.. everyonce in awhile give the head of his d*** a little twist as your going back up it (my man loves it)
and when your givin a bj and your mouth starts to get tired, use your toung more and give your mouth a little break :D oh and iv heard if you use your tongue and go in circles under his head it'l speed things up.. iv treid and it didn't work for me
Hold the shaft of his penis just underneath the fold of the skin below the head. Stroke slowly bringing your hand and the skin of his penis over his head. He will definitely begin to drip a little. Once the head is wet, spread it around a little, it gets very sensitive and he should come in no time. Vary the strokes randomly by gently pulling the skin tight by moving your hand to the base of his penis.
For a BJ, do the same thing except when you pull the skin back slide your mouth down his shaft. Kind of a BJ hand-job hybrid.
TRy focusing on the spot where the head of the penis ends and the shaft begins it always works for me when my girlfriend gives me a bj