That's an interesting link! We knew all this back in the 60s and 70s, when everyone was trying to figure out how to trip if there was no acid around. The website is a little optimistic on its expectations though. I never knew anyone who hallucinated from drinking coffee or eating nutmeg. Same for the cheese and stuff, that sounds more like a mild poisoning effect.
We did try nutmeg and morning glory seeds, you can soak them in alcohol and eat the residue, but what you get is lysergic acid, which is just the "L" of lysergic acid diethylamide, or LSD. It's not a very good trip. Your best bet is plain old 'shrooms. High potency there! You need to figure out which ones are which though, they're different varieties in different places. We always headed to the cow fields after a rain, even the cows would eat them and trip. What else did they have to do all day? If they were standing around, there were no 'shrooms. If they were lying down w/ big eyes, we could score. You were always guessing on the dosage, but it was always a good trip.
I discovered a neat sleep aid called diphenhydramine HCI, which is in OTC medications like Sleep-Aid. Like most of us, I have trouble w/ sleeping due to tinnitus, and this works great for me. The dosage is 50 mg in liquid or a squishy pill, 2 or 3 do the trick for me. I've been dreaming much more vividly now that I'm getting deeper sleep. They don't appear to have any bad side effects, just the usual things one gets from a sleep aid. Drowsiness, which is why you would take it anyway, mild balance issues (not a problem if you're lying down to sleep), possible dry mouth, etc. It's a pretty mild drug, which is why it's OTC.