When I'm getting low, I just get as calm as possible. Like, sit in a chair for 15 minutes. Then, very slowly, I take a FAT rip. Then, whilst holding, jump up and do some rigorous activity. Could be placebo, but it sure feels like a fatter hit.

Also, sing while blowing out. Lets the smoke go through your voicebox. Also could be placebo, but when I'm low I'll use whatever I can to stretch it out.

"BRAD! What are you doing in there!?!"
"NOTHING! Uh, singing! I sing! Why can't I sing in here? Go away!"