1) Forgetting your license and/or tag. I'veforgotten my deer tag ONE time and couldn't hunt all weekend. I learned my lesson.
2) Blisters on your feet. It hurts to hunt when it hurts to walk! I learnedwhat 'prevention' was all about the hard way too.
3) Hunting withsomeone who calls you on the radio too much,complains too much, or is hard to get along with.
4) Not being prepared for the weather.
5) It hasn't happened to me yet (knock on wood), but getting sick the day before you leave, or getting sick while you're there.