Number one best thing is to find a good bow shop with knowledgable people to help setup your bow and arrows. The right people can have you shooting accurately in short order. The average bow shop will not. By yourself, the leaning curve is steep.

Next, make sure your bow fits you. The draw length has to be correct or you will not shoot as well as you could. A good shop will get this correct on your bow or let you know that the bow you have is not going to work. They can also help with form.

Pay a lot of attention to your arrows. Learn the importance of high FOC and spine tuning your arrows. Even good shops will not do this for you. It's too time consuming and expensive for a shop to bother doing this. Shops also tend to guide customers into what they like. If they prefer fast arrows that's what you'll end up with. If they prefer a particular brand of carbons, you'll end up with those. Just keep in mind, the arrow design and tuning are many times more important than the bow.

Last, learn your limitations and use them to determine what you won't shoot at. You don't need to be the best archer in the world to hunt, but you should know what range and situations are within your ability to make a clean kill at least 95% of the time.