I put a germinating tray on top of a germination heating pad. I put my seeds in Root Riots that I snip open on the small bottom end, insert the seed like a hot dog on a bun, and stand the wide end of the root riot in the germ tray. I put on the top to the germ. tray and open the vents: I don't want the water evaporating too quickly, so the germ heat pad has to be at the right temperature--not too hot, but keeps them warm. I use pH'd water and a small syringe to keep them moist, but not soaking wet.
When I germinate I make sure I'm gonna be around a lot, and I check the moisture level of the root riots a couple of times during the day, make sure they're nice and moist (but not soaking) before I go to bed. Usually they germinate in less than 48 hours, but some seeds just take longer than others to pop up.