Kegel
Although this exercise is commonly publicized as a woman's exercise, men can also benefit immensely from exercising their kegels. By training your kegel muscles, you'll be able to get stronger and longer lasting erections. Simply squeeze your PC muscles as hard as you can and hold it for 3 - 5 seconds. Do this every day, and you'll notice that you'll have better ejaculation control and a wider penis base.
Penis stretches
The next thing that you need to look for is a guide on penis stretching exercises that will help you stretch the tissues of the penis. Since there are several types of penis stretching exercises, make sure to do exercises that will help stimulate the tissues to expand. But try not to go too far with the exercise if you don't want to cause your penis any permanent damage. If you start to feel any discomfort, it just means that you need to take a break. Penis growth through stretching and exercises occurs over time (much like how muscles grow when you exercise) so don't rush things, just be consistent.
Are you ready for the main event? If you're sick and tired of other enlargement methods that just don't work, then start looking up how jelqing will be able to help you out. Jelqing is a type of penis exercise that will be able to help promote healthy blood circulation in your penis area as long as you practice it often. This famous exercise focuses primarily on penis length gains, and is the base for many other exercises that have developed.
One resource that incorporates all of these methods and teaches about them extensively is the ever-popular Penis Advantage program which works by giving its members daily exercise routines to help them get bigger.