When I come home from a foray where I gather specimens to study, the first thing I do is try and get a spore print. I lay out as many 3x5inch index cards as I have species of mushrooms and write the date, place and a description of each mushroom on the card. Then I add a glass slide to my card and put the mushroom on top of that slide. This way the spore print will be deposited on the slide and I can look at the spores within an hour or so.