Here are some of the most common crochet mistakes and how to fix them:
Not knowing what size hook to use: This is a very common mistake for beginners, as it can be difficult to find the right size hook for your project. Pick a hook size that works for the yarn you have. The best way to do that is by checking your pattern or yarn label for the recommended hook size. But since everyone crochets at different tensions, do a few trial stitches first to make sure you're happy with the density of the fabric you're making and the shape of the piece. For example, if your hook is too small for the yarn that you're using, your fabric might be super dense and it might curl unnecessarily.
Not counting stitches: This is a common mistake, especially when you're working on a pattern that involves a lot of counting. Where you put what types of stitches affects the final look of your piece. If you lose track of where you are in the pattern, you can wind up with a doily instead of a penguin.
Your project keeps getting wider and wider: This is usually caused by accidentally adding extra stitches in a row or round. To avoid this issue, always make sure you have the correct number of stitches in each row or round as you go.
Confusing US and UK terms: Always check a pattern to see if it's written in US or UK terminology. Certain phrases mean different things in different countries. For instance, a single crochet in US terms is called a double crochet in UK terms.
Forgetting to turn: When working in rows, it's common to forget to turn your work. This results in a completely different shape than what a pattern intended.
Not using stitch markers: Stitch markers help you keep track of what row or round you're on. Without them, it's easy to lose track of where you are in a crochet piece. If you make a mistake, without stitch markers, it becomes hard to figure out where the mistake is and you might need to frog a lot of your piece to get back on track!