Very Carefully!! I use a razor
Very. Very. VERY carefully. Lots of shaving cream or shaving butter, a nice sharp blade, take your time, and pull you cock out and/or get it hard so the skin is as smooth as possible. Nothing worse than having the blade nick you because it got caught in loose skin, it can bleed a lot.
For those nice danglies, same advice as above, but squeeze just above the balls and make themstick out so the skin is stretched.
An absolute must is don't rush it!
I used to shave it then once done when in the shower quickly go over it all to keep it away, then one afternoon I found the wife's hair removal cream and tried it, wow I smear a little on now and then, then have a face shave, jump in the shower and wash it all away.
Nice and bald shaft and nuts....
I have a female friend who works at a spa... she uses a laser on me after hours for my shaft and balls. My wife has hers done at the same time. Occasionally we have some after hours fun ...