Avoid dairy products while doing shrooms, that means yogurt. Avoid exposing them to high temperatures, psilocybin is very sensitive to heat (100 fahrenheit can reduce their potency).

Do not pick them unless you know what you're doing, general descriptions do not work. A good dry dose is maybe 3-4 grams, 2-3 could be a bit weak. Eat about 2 grams, wait 40 minutes, eat a gram more.