Finding certain procedures and sticking to them are the best way to build up your muscles. Many people complain that they just do not have the time because of their family and work responsibilities. However, if you will find a certain routine to follow, you should have plenty of time.
It is really just a mindset. If you really want to have that muscle, you can find the time. After being on a routine for a while it will become second nature. Usually the best time to do your exercises is in the morning. This seems the best time for this to fit in.
Sometimes people do not like the routine that they are doing. If you do not like it, then you are more apt to quit. You need to do some research and maybe talk to a professional trainer to make up the perfect routine that fits your needs and you will enjoy doing. Also putting your exercise off until the evening time will sometimes prevent you from not exercising. Your excuse is that you are too tired. There are many things you need to do in order for you to want to exercise.
Remember, it is the intensiveness of the workout and not the length that really matters. You need to be working on certain muscles every other day. That is why it is important to set out your plan of exactly what you are going to do. One day you will work on one set of muscles, and then the next day, you will work on something else. This gives the muscles that you worked on, time to rest and heal. Slowly increase your repetitions of each exercise over the month.