I carry a snare for fatigue recovery activities when I don't have anything productive to do. It doesn't sky rocket the trapping skill, though, but there is a trickle improvement.
Weatherlore can be used to determine whether to set up a rain shelter for the night while traveling, as well as to determine whether is seems like a bad idea to venture out in the middle of the winter if you haven't gotten hold of enough clothing items to deal with the coldest periods. It can also be used to try to determine whether you should try to cross frozen bodies of water during spring, assuming you don't want to risk getting caught on the other side after a day of intense melting.
I do agree with Tinker that means of improving the ability to light fires would be welcome, though, whether through skill or technology.