A good muscle building program includes a workout!
Obviously this goes without saying. But make sure you do it right. Don't overtrain your muscles and they will grow, overtrained muscle groups will never fully recover each night and will actually stop growing. A good muscle building program includes weight lifting on each muscle group at least once a week but never two days in a row. Your muscle building program should target each group and push it to failure in three sets. Do this 3 times a week for an effective muscle building program.
Feeding your muscles is important to any muscle building program
Make sure you take supplements as part of your muscle building program
Let's face it, to build muscle you need testosterone, and lots of it. If you're older, than taking body building supplements is a great way to boost your muscle building results. No matter what your age taking a good solid multi vitamin designed for people who lift weights will give you all the things you need to get huge.
Without sleep your muscle building program will fail
And finally, make sure you consult with a physicial before you start any diet or workout program, for your own health safety. You will of course find other helpful links on this page to help you in your quest to find the best muscle building program.
Now that you know what to do here's a great article detailing the most common, proven effective weight lifting supplements out there. If your serious you need to go all the way.