Not alone. If you're crashing from meth/coke/whatever, alcohol in sensible amounts (max amount a 330ml six pack - not wine or spirits as they dehydrate you too much) can be useful.
For me a good crash consists of:
Just before my last pipe of crack, or when speed has worn down to the point I'm not high but the residual stimulation is there, I take benzos or zopiclone. Don't take zolpidem or shit will get really trippy and weird. Long lasting benzos like diazepam or clonazepam are good, but shorter acting ones absolutely will do the job; they just tend to hit harder and faster, and can leave you feeling anxious and irritable when you wake up. If course you can mix and match a little if you are experienced with benzos.
After the benzo, it's nice to have a shower if you really need one. By the time you're out, the benzo is starting to work, then I will have a few beers (like 3-4) and if you're so inclined, a little joint. The benzos will help prevent anxiety, but if you don't like weed or get paranoid easily this step isn't needed.
Have some food whilst you're all monged on benzos/beer and watch a nice familiar movie that you love.
IME I'm normally falling asleep before the end of the film (hence why you shouldn't pick something too gripping) and will go to bed and pass out for 10-12 hours, bumping into walls on the way.
As long as you don't drink more than a few beers or equivalent, you should wake up fairly fresh.
I actually like the comedown from meth/crack as much as I do the stimulant as long as I have the right tools for the job!