Falling behind is not an option. Has is happened to you that sometimes you’re wrong and can not find the way forward? given up will lead you to failure, but if you want keep going you must be focused, learn your responsibilities and keep busy.
Being focused will allow you to know what are you doing. Be clear in your goals. You don't get lost in the way and see what you don't want to do wrong. Learn from your mistakes and fix it, because, all your life you are going to deal with problems.
Be responsible makes your life more easy. Do your homework and not look bad with your teacher or boss. Also, make brief notes to help you remember what you have to do and when.
The last one is “keep busy,” which will allow you not