Well the easiest way to break thru on smoking a dry salvia extract is (1) smoke in a bong and use the tip of the flame which is hotter (2) take in as much as you can per hit (3) hold the hit(s) in as long as possible (4) do it in a totally silent totally calm environment (no music, no people jostling the couch, no talking, no one moving around the space etc.) (5) REMAIN COMPLETELY STILL except for normal breathing... bodily movement and sounds/movement in the environment can tend to disrupt the radical mind/body dissociation that is the hallmark of salvia (and IMO is the cause of the "zippering" sensation many feel) by forcing signals from the body nerves into the "mental body image" part of the brain which disrupts the proper trance formation. This last point is a very important facet of getting off on savlia I originally read about when it first came out that I almost never hear mentioned these days, but I always found essential for "going somewhere else."
But to REALLY do salvia for the kind of experience for which the ancient discoverers/cultavators/shamen used it for... USE A REPUTABLE LIQUID EXTACT such as "Emerald Essence" which never failed to give me great results, following the sublingual dosing directions that come with it exactly. The come-up is a slower, but thats good because you have more time to observe and follow the changes and not just become totally confused which is what normally happens when it is smoked. Also, it lasts longer so you actually have time to appreciate and explore the state. Otherwise, smoking is really equivalent to having your head stuck in a toilet and flushed. As quick as your mind can form the words "What the fuck???" it's over. Totally useless except as a sensorial novelty whack to the head.