Pace Yourself While Biking

Being a slow biker is nothing to be ashamed of. Read this article, and it should help you to become a better one.

Steps

Pace yourself and take full advantage of flat and downhill moments; this is when you can just coast or pedal lightly and regain some energy. Also, pedal a little harder at the end of the hill to increase your momentum as you move to the level or uphill.
When going up hills, switch to a lower gear so that you don't have to work as hard. Sometimes it may actually be better to use a higher gear if you can to get to the top of the hill faster. Decide which way you like better.
Always take full advantage when you take breaks. Take a drink, sit down, or just lie down and close your eyes.

Going on short rides and practicing will increase your stamina and allow you to bike longer.
Make sure that you know that you can make the bike ride without passing out or having a heart attack.
Wear sneakers with good padding or your feet may be sore later.
If your feet hurt after a ride, look into insoles. When pedalling only the balls of your feet are in contact with the pedal, so some people need extra arch support.