This is not really a technique but more of a preparation for the other techniques. Before doing any of the other techniques, this one should be done first, as it will help to expand the blood vessels in the penis and increase the flow of oxygen fresh blood in the penis, preparing it for the following techniques.
Now for the first step, either: 1) Wrap your penis in a washcloth soaked with warm water. 2) Get in the bathtub and run warm water over your penis by putting your penis under the faucet (test the water first with your hand, so you don’t burn your self. 3) Soak In a Warm Bath.

Do any of these for 5-15 minutes. This will help to expand tissues of the penis and bring in more fresh oxygen rich blood. After this step you penis will have a pink hue and be slightly swollen.