Lot of bowls, arrow shafts, short bows and skis can help.
I've not run the numbers, but arrow shafts might be the best way to skill CARPENTRY now. It has |1|, takes 90 minutes and uses a board as a resource. Short bow takes 5h 20min, has |2| for skill increase and uses a board as resource (crafted bows can be unstrung to reuse the bowstring for making more bows)
Shafts are low trade value, bows esp. strung are decent value.
Paddle uses the same single board as resource as arrow shafts, takes same time. But has |0| for skill increase. To counter that: paddles have better trade value than shafts.
If you make those arrow shafts in to decent/fine arrows, even with bone/stone heads, you get wealthy trading the skill grind output.
And like with any skills: it's better to do simple task on low volume multiple times, rather than patch work it all one skill roll, and max 1 skill increase.
E.g. don't spindle 255 feet of yarn in one go. Most you'll get is 1 skill increase. Rather do the task 17 times and only spin 15 feet at a time.
you'll get 17 chances of increasing the skill. With luck, first 5-6 spins will give you 3% increase and you can leave the other spins for following day.
(I like to experiment when playing, and often choose very easy start: tank physical skills to lowest, pump up carpentry and textile craft to 50+, rest can go to hideworking, fishing or weapon skill(s))