Wee in wetsuit to warm it up. But GET IN THE WATER FIRST or you will feel a bit of a tit and I would laugh at you. If you remember to let one out before getting out, all well and good, saves needing one on the bike. Otherwise, use as chemical weaponry for the one following you who keeps accidentally tapping your feet. It is really hard to keep a leg kick up when having a wee I find.
Someone else can cover weeing on a bike.....I have never done it. Some do.
Weeing on the run just gives you blisters on your feet and smelly legs.
Sighting is practice, if you know you are doing ten strokes in a straight line, sight every ten. Adjust it to suit. Do your own sighting, don't follow Mister Zigzag, he will wear you out. Sight to distance, not close up. AT least next buoy, preferably a large tree that is recognisable. At Outlaw, it was 40 minutes sighting on the sun. Even I could see that. Good luck. Report back, don't forget.