I've got this trick. Basically, I start relaxing the muscles on the way to the restroom. Not enough that there's any chance I'll piss myself before I get there. Just enough that by the time I'm in front of the urinal, it's not difficult to start the stream quickly.

There was this one time I felt kindof bad about. went to the restroom where I worked (back before I was working remotely) and used "the trick" as usual. I get there, and there's a guy at one of the urinals already. I peed, flushed, washed my hands, and left the restroom before he produced a drop.

Of course, in all likelihood, "the trick" won't continue to work so well as my beard grows grayer, and some day I'll be the other guy.