For your first time i would suggest 5x... just to get used to the weird feelings it can create, then pick your strength... they all produce a different trip every time you smoke them...

but know this. nothing will prepare you, no matter what you expect, its gonna be mindblowing.

pack about 1/3 of a bowl, and torch it the entire time you're hitting it.

and it is most crucial that you hold your hit for a minimum of 30 seconds, unlike thc, salvinorin absorbs quite slowly... if the first hit doesnt effect you, take another shortly after and you will trip balls

also, set the bong down immediately after you are done hitting it, or you could end up with some shattered glass