Well, this is a tricky one. I usually fix that problem by dosing very early, typically 8am but I imagine most people can't do it and neither can I lately.
If you dose that early, I've found that by 9pm you'll be completely down, even if you might experience an afterglow. I usually fall asleep by 1 or 2 in the morning regardless of how early I got up so I'm not a perfect example, but still that's not bad either.
Also don't just throw yourself in the bed once you think it's time to sleep, take it easy. Relax, eat something light, put some mellow tunes on, have a shower, brush your teeth, dress comfy perhaps meditate for a bit and than turn of the lights, cover yourself up and put up a show or a movie until you daze off.
If you dose it later, which most people prefer since it is a recreational drug after all try to have the next day of and you'll catch up even if it's in intervals, though you might miss the afterglow this way.
I don't advise on combining drugs like some others do, it may do the job but it isn't the solution long term. Deal with the fact that all drugs have consequences, and the thing with LSD is that it will keep you up unless you do it really early or even than actually. You better of ride it out, since the brain will easier adapt to just one thing being off than another one being thrown in the mix the counter the effects of the first. It has less of work to do to get back in balance in the long run.
) to use benzos to get to sleep after tripping.
