Here's a big one. Know your limits and stick to them. For instance, I can't go to bed before relaxing so I'll go to bed around 9:30-10a. But I know that I should not drive or make any important decisions after 9a. I am DUMB and I can feel my reaction time mentally and physically slower. I once stayed up to drive my son to a doctor's appointment at 11am and I was nodding off in the waiting room and I can imagine people might have assumed I was on drugs.

Also, I require 4 hours of sleep to function so I will not make any appointments before 3pm. If I get up before 2 pm I am still dumb and woozy. Not a good thing if I'm trying to be a functional day walker.

Family, friends, school, work...they may try to ask you for things like you're a normal person but you are not. You are a night walker now. Stick to your guns. Sometimes this will result in someone complaining "you're always sleeping during the day". Remind them that if you worked during the day, you would be just as inaccessible.

Good luck.