Let's face it: weaving in ends is not nearly as fun as crocheting or knitting. My favorite way to avoid weaving in ends is the felted join. Also affectionately dubbed the spit splice, this method is the perfect way to add join a new skein to your work. Keep in mind that this will only work on feltable fibers like non-superwash wool, alpaca, mohair, and so on. Here are step-by-step instructions on this fast and easy technique. I used 2 different colors so that you can better see the technique, but this works brilliantly for attaching the same color yarn practically invisibly.
Step 1: Carefully untwist your yarn for a few inches and separate the half of the plies. This Fishermen's Wool has 4 total plies, so I've divided my yarn into 2 sets of 2 plies each. 2-ply yarn would be separated into 2 sets of 1 ply each, 6-ply yarn would be 2 sets of 3 plies each, and so on.
Step 2: Take one set of your plies. A few inches down (4-5 inches, just to be safe), break these plies. Now you'll have a set of longer plies and a set of shorter plies.
Step 3: Repeat steps 1 and 2 on the yarn you'll be joining.
Step 4: Lay the long sets of plies next to each other. This will be the transition section of your yarn. Because each long piece of yarn only has half the plies, you'll end up with roughly the correct thickness in your join.
Step 5: Get your yarn wet. You can dip it in water, mist with some water, add some saliva -- just get it wet. Remember, felting simply requires heat, humidity, and agitation.
Step 6: Let's felt! Rub the yarns together in your hands briskly. Continue for a few minutes until the fibers have locked together. You may need to add some more water if your yarn isn't wet enough.
Step 7: Give both sides of the yarn a gentle tug. If they're firmly locked, congratulations! You've made a felted join! If not, just continue the felting process until the yarn is secure.
Now you'll have an easy and secure join in your yarn, so you can continue crafting with having to weave in ends.