I am a new father to a little boy who is now 16 weeks old.
My wife had done quite a bit of reading around but hadn't come across this idea, which I thought up myself. Not sure if this is well known, but it's saved us a pile of changing and washing, so I thought I'd share it
Basically when putting the nappy on, I do up one side, and then grab a small cotton ball and put it right at the top of his penis i.e. at the base of it, leaning against the base and kind of blocking it downwards. This keeps everything pointing down between the sides and towards the absorbent centre of the nappy. When doing up the second side of the nappy keep a finger on the cotton wool ball so that everything stays in place, and do it up reasonably tightly.
I hope that's clear enough, and that it saves a change or two.