I can't help with any packer advice, but for me, it's important to aim to one side...if you aim straight ahead, the splatter will land on your hands, pants, and shoes.
Don't look up; pay attention to where things are going. (Classic urinal graffiti, written above head-height: "Don't look here, you're peeing on your shoes")
Stand close to the urinal; not touching but not far away. The tip of the penis should be just over the porcelain. (This keeps dribbles from landing on the floor) If you have "low pressure", stand a bit closer.
Don't look at your neighbor's penis...it's considered rude. You will find yourself reading the printing on the flusher, and the graffiti, over and over until you're done.
Shake, put away, and wash your hands...and double-check that your zipper is up, and your shirt is not caught in it.
Hope this helps.