Explore 12 common coding mistakes beginners should avoid in this 32-minute video tutorial. Learn to write cleaner, more efficient code by steering clear of pitfalls like infinite loops, incorrect data types, case sensitivity issues, and improper indentation. Gain practical tips to reduce debugging time, enhance user experience, and improve code quality and performance. Cover topics including off-by-one errors, modifying lists during iteration, mutable default arguments, exception handling, file management, hardcoding values, code complexity, and global variable usage. Apply these insights to code smarter and more effectively, setting a strong foundation for your programming journey.