Just a little early season PSA prompted by a personal experience. Always turn your beacon on before you leave your house. I know it's not as snappy sounding as "on at the car, off at the bar" but if you check your beacon at home, you actually have the oppurtunity to do something about it. If you just check it at the lot, you're stuck waiting with a dead beacon while your friends tour.
Checked my BCA tracker 3 at home yesterday before I headed out. Turns out it's super messed up, won't turn off, and won't switch from Transmit to Search mode. Because I checked it at home I wasn't stuck skiing with a faulty beacon, and I was able to borrow a friend's and still head out. Same goes for dead batteries.