It depends on the mistake.
- If you’ve made a mistake with the number of stitches and increasing or decreasing would be too noticeable, unraveling is often the only solution.
- Dropped stitches can almost always be picked up with a crochet hook.
- If you forgot a yarn over in the previous row of a lace pattern, you can work it in from the strand between the stitches. If you made one in the wrong place and haven’t knitted anything over it yet, you can simply let it drop. Most stitches are forgiving and will distribute the shortage or excess evenly among themselves.
- If a stitch was worked with the wrong color, you can embroider over it with the correct color using duplicate stitch, using double or thicker yarn if necessary.
- If you’ve crossed a cable in the wrong direction and don’t notice it until the end, you can cut open the top layer in the middle at one point. The correct crossing lies underneath. Slide the incorrect one under the correct one to the back and sew the loose stitches together there using Kitchener stitch and a fresh strand of yarn.
- If a neckline has turned out too tight and you don’t want to unravel everything, you can use a sewing machine to sew a new, wider line as a reinforcement and then cut the neckline further within that reinforcement line. Then add a facing to cover both the outside and inside.
Above all, don’t panic and start unraveling right away—first consider whether the mistake is a big deal or not. If it isn’t, you can ignore it. If it is, sleep on it for a night; you’ll often come up with a creative solution, such as the ones mentioned above.