The farther out you get, the more factors that come into play and will affect your shot. The only real difference when hunting raccooms is that they are generally nocturnal.
Only specific periods in a year and in a day are permitted for deer hunting. An experienced hunter should have complete knowledge of the animal he is after, the places it usually frequents and when it can be found there. If you are hunting early morning or late evening (if your not, you should be) you need to gather as much light as possible.
Not only can they smell your presence upwind, they smell where you've walked. Also, don't hurry in your decision of on which rifles to choose, this is a very important decision, and you need to weigh all the options before you make your decision. It is advised to avoid head shots.
Imagine if you came home and someone had moved your sofa. Congratulations, you are about to embark on the most exciting sports ever known to man.