For a lot of new people including my self I assume we start off using a pipe with layer of bud then spice and then another layer of bud. I have some tweaks to this system if you are using it. Of course its optimal to use a gvg or maybe a crack pipe or machine. Here it goes..

smoke a bowl of bud pre hand till almost ash.
put spice on top.
use a poker to mix the spice and ash.

I believe the mixing rather then sandwich will help to not waste any spice.
I have thought of maybe putting a bowl shape tin foil cap on the bowl to make sure no flame touches the crystals. I might try that and I will report back, but thoughts on this?

I would of put this under the smoking category, but it appears I don't have full membership?

Let me know what you think or if this was helpful.