Iv got a decent high off of simply bubbling about a gram in some margarine on the stove for about 5 minutes then taking a shot of it (there was about half a shot glass full of oil. Eat something at the same time to get your digestion working.. that little in your stomach on its own isnt enough to trigger digestion.

eating salvia will not make you trip.. not even slightly. What you may have heard is using a quid / tincture etc. Basically, you just put the leaves or extract in your mouth and hold it in there without swallowing for about half an hour. The salvanorin is absorbed through the porous tissues in your mouth.