yeah with leaves your best off taking the biggest bong rip you possibly can, if you don't own one, make one, also the salvia burns at a much higher temp than weed does, you need a butane jet lighter or pencle torch, and you need to keep the flame on it the entire time your taking a hit, not just long enough to get an ember going like with weed. if done right you should take 3-4 huge hits as fast as you can, the effects will be mild unless you get extract, try purple sticky salvia brand if you can find it, one hit as i described will put you in another world.
the last time i did it all the furnature in my living room turned into buildings, and i though i was spiderman swimging through them, my girl told me i was really staring at the carpet and drooling, while saying "hey lady! what are you dooooooooing?" apperently to knowbody,
not as bad as her trip though, she came to focus and told me she saw herself as a target, and me a walmart, and our arms and legs were the isles in the stores....