do it in a place that you feel most safe or comfortable. Make sure you dont have to worry about doing anything, even as simple as sleeping. I have an anxiety disorder and any time i have to sleep for school the next day, i cant be high or ill panic. If you live with your parents, make sure that they wont "get in the way of your high." Like a curfew or something. Try and do something besides watch tv, it will keep your mind off things that make you panic. If you do start to get anxious just remind yourself its just the weed, and that it wont harm you. Also knowing your limit is important, the most hits i ever take is 3, 4 if im not feeling it by then or want to finish a personal bowl. I have reverse tolerance or something like it, so thats all i need.