Common mistakes in pasta(باستا) cooking include overcooking, resulting in mushy noodles, and undercooking, leaving pasta tough or crunchy. Insufficiently salted water can lead to bland pasta, while overcrowding the pot can cause uneven cooking and sticking. To avoid these errors, follow package instructions for cooking times, taste pasta for doneness, salt water generously, use a large pot with plenty of water, and stir occasionally to prevent sticking. Additionally, rinsing pasta after cooking should be avoided as it removes starches needed to help sauces adhere.