You have to remeber, shooting a bow isn't like shooting a gun. It takes practice, practice, practice. And if you think you've practiced enough, you better do some more!
Sighting in a bow, doesn't come right away. you have to learn simple mechanics to shooting. And work on it over and over, until you develope good habits in shooting.
If you bow isn't even sighted in, you should think about not hunting this year. Like i said, its not like shooting a gun, were you can be close to the kill zone to take a deer. But with abow, you need to be dead on!
Plus it's safe to wait until next year, will you'll feel very safe and confident in your shooting, because if you go out there, miss or wound a deer, you'll just do more harm than good. And it will decrease your chance for next year!\
So, take your bow to a sporitng good's store, shoot it in there, and let some one watch you. They can give you pointers at what your doing wrong, and how you can correct it!
Good luck,
Jason