Magfan, you're quite right, 3M 77 can get away from you if you're not careful ;-) However, here are a couple of tips that should help; actually they apply to all aerosol preparations:
1. Shake, shake shake! For a full two minutes before use and for at least twenty seconds between each shot.
2. When all finished spraying, or even stopping for a few minutes, ALWAYS tip the can upside down and spray the excess out of the nozzle and then wipe it off with some kind of solvent like paint thinner or naphtha.
3. While you're working, whatever the medium, be it paint or adhesive, keep a solvent-dampened rag nearby and keep your hands clean and dry (to avoid the fly-paper syndrome ;-)
Most people forget to do these things, especially the last two. But a few extra minutes of patience and planning can make all the difference
.