Having the right diet for the purpose is the basic thing you need to do. There is no room for too many carbs as they will not help your cause. The focus is generally is on eating more proteins. If an expert suggests, you may take protein supplements as well. The idea is to have the right amount of calories as you do not want to consume too little or too many.
Pushups are one of the best exercises in the world in general. It will do great if you are trying to build strong chest muscles as well. Make sure that you do the exercise in the right manner.
Lifting weights on the bench is an excellent way of building a strong chest as well. This needs to be done when professional help is around and it is to be made sure that you do it right and do not overexert yourself. Be sure to start off with lighter weights before going for the heavier ones.
In order to build the pecs, you need to do separate exercises and make sure that they get enough individual attention.
It is easy to go for the overkill and work yourself to exhaustion. That never helps and you need to make sure that you do the right amount of exercising.
Hire a Trainer
It is best to have professional help so that you do not make mistakes that most rookies do. It will help you in getting it right from the word go and you will be achieving your goal quickly.