Things to keep in mind:1. Boxing can be a very dangerous sport.
Without proper training and equipment you can seriously hurt yourself or others. Not just when your in the ring sparring or fighting, but also when your training. You can break your bones by hitting a heavy bag incorrectly. Be sure to have a trainer or a coach who knows what he is doing, and has your best interests in mind.
2. If your a beginner, don't be affraid to tell people.
Some guys out there are always looking for that human punching bag. Don't become one, no matter how good you are on 'the streets' or in the gym. If you do end up sparring someone make sure your both in the same weight class, and that your coach/trainer is in your corner helping you. What good is practice if you keep doing the wrong things?
3. Weight Classes are important!
There is a reason why professionals and amateurs fight at the same weight classes. A person who weighs 140 pounds can punch a lot harder then a person at 132 pounds. Again, before you spar make sure your coach/trainer is in your corner and has your best interests in mind.
If you find yourself getting tired while punching, try to relax. Most times you will get tired because you tend to get tense when throwing a punch. Not every punch you throw should be that knockout punch. Stay relaxed use your combos and your 'haymakers' when needed. Knowing how to control yourself is the #1 thing to learning how to box.
5. Protect yourself at all times.
There will be times in the ring when the officials give you both an order to stop punching. That doesn't mean let down your guard. Your opponent may not have heard the official or the bell and might throw a few punches when you may not be expecting it. For those of you who have seen the movie 'Million Dollar Baby' know what I'm talking about.
With that in mind be sure you have the proper boxing gloves and proper hand wraps. Think of it this way, if your marathon runner who decides to compete in flip-flops, you won't get really far before injury and pain sets in. Be sure to not only have the proper equipment but to use the equipment correctly. Get a coach or a trainer to help you wrap up.
7. You need to Shadow Box.
A lot of the equipment in the gym is geared to teach you how to hit something. The importance of shadowboxing is to not only loosen your muscles but your body then learns what it feels like to miss. It should be done before a good hard workout. Stretching will help you from cramping up and tearing muscles.
You don't want to move in the direction of a power punch and you don't want to become a still target. It's much harder to hit something that is always on the move. Learning proper movement and footwork comes from having a good trainer or coach.
9. Get a coach or a trainer!
I'm sure there are more things to remember. Which is why you need a coach or a trainer who knows exactly what they are doing. They have other things they would want you to know and remember. Go down to your local gym and have a chat with some of the trainers/coaches.