Good advice in previous posts. If you're restrained and your ler is using anything like rope, allow for some circulation... doesn't have to be too tight to be completely effective, and you don't want to pass out. Don't over hydrate beforehand... contributes to mid-session sweating and bathroom break (be polite, use deodorant lol). In my experience, anything that adds some fatigue (light sleep, exercise) beforehand heightens ticklishness a bit. Remember to breathe. If you have anything erotic on your mind, ask permission, don't assume. Pay as soon as you arrive, so she doesn't have to ask. If you don't want to be cold and clammy to her touch because of the nerves, it could help to wear long clothing until you arrive, and get a decent snack/meal in you so you're burning some calories. Good luck and let us know how it goes!