Always good to set up a signal system with each other. I used to ride pillion on my dads bike a lot. If i tapped his left leg then I wanted him to slow down or if I tapped 3 times it meant stop. I'd tap his right leg to let him know I was ready to go. I would wait to get on or off the bike until he got his feet down and gave me a nod to say he was ready. Simple. tell them to sit there like a sack of potatoes and not fidget as it can unsettle the bike if they're bouncing about. Also warn them about the fact your helmets might bang off each other a bit but not to worry about it.
Things I wish i'd been warned of before getting on a bike are the wind noise is something I wasn't expecting and also remind them to relax, tell them not to hold on too tight,either to you or the grab rails as they'll get sore hands. I always prefered holding around the riders waist with both hands but the grab rail can be handy when going slower. if they go for both hands around you tell them to put their hands back to back, one to push on the tank while braking (so they don't slide forward and squash your gentlemans gentleman) and one to brace against you while accelerating.
As others have said, relax, take your time and enjoy it. you'll be fine. nice deep breaths buddy! 8)
Things I wish i'd been warned of before getting on a bike are the wind noise is something I wasn't expecting and also remind them to relax, tell them not to hold on too tight,either to you or the grab rails as they'll get sore hands. I always prefered holding around the riders waist with both hands but the grab rail can be handy when going slower. if they go for both hands around you tell them to put their hands back to back, one to push on the tank while braking (so they don't slide forward and squash your gentlemans gentleman) and one to brace against you while accelerating.
As others have said, relax, take your time and enjoy it. you'll be fine. nice deep breaths buddy! 8)