I duct tape my boots the first time they see the snow. Typically I'll replace the duct tape a couple times a season as it gets beat up, but I've never had problems with it lifting due to moisture. However, another benefit to duct tape is how it blocks the wind from getting through on really cold days.
On the down side, it will cause your feet to swear more, since there is no longer air coming in circulating around your feet, so having spare dry socks is key for long days on the hill.
My most known uses of duct tape, the boots (obvisouly), many gloves have been duct taped due to rope tow damage (the down side of teaching beginers when only ropes service your beginer terrain), most recently I duct taped my helmet to hold an adjustable vent in place and cover a couple on the front (to prevent goggle fogging), I've fixed a broken tail of a ski with a 2x4 and duct tape, and while it didn't really want to turn, it certainly was fast, and I won the "Duct tape award" at my local area when I used it to fix my pants. I ripped em (crotch) with 3 weeks left in the season and didn't want to pay for new ones, well the rip got worse and worse, and eventually I basically had a duct tape diaper on the outside of my pants (which I wouldn't recomend, I almost fell off numerous lifts because that stuff is slick).
Now, as Scalce said he wouldn't duct tape his jacket if he could get if fixed. While I understand this, I just couldn't be without my jacket for that long, so duct tape it is.