Wheelie on a BMX Bike

Ever wondered how your friends pull wheelies all the way down the block and you can't even go a sidewalk block? What are you doing different?

Steps

Start at a slow to medium speed. As you get better you can go faster. Don't go faster than you can run until you are really comfortable with wheelies.
Figure out how you want to place your feet. Do whatever feels better. Generally a right handed person has their right foot forward. Left is the same. Place your feet like this, stronger foot in front.
Take a very slow pedal so your weaker foot is at the highest point it can be. Your crank arms should be vertical with your strong foot at the bottom.
Start taking a strong pedal. When your strong foot is at the front lean your weight backward and pull up with your arms slightly and smoothly.
Keep pedaling until you find your front wheel at about the degree of a slash mark (\). If you're starting to flip backwards stop pedaling and let yourself coast in a manual. However, it may be more effective to tap your rear brake (not to be confused with coaster brake) to bring your front wheel down slightly. If you start falling forward pedal harder and faster.
Show off to your friends, to your girlfriend, to your mom, or to your dad.

If you're starting to flip backwards don't pedal as fast as you can. Doing this will only make it worse.
If you start falling forward pedal harder and faster.
As you go farther in distance you'll have to lean back more and pedal harder.
Remember, a long wheelie is more impressive then a high short wheelie. Of course a long high wheelie is the best.
If you do flip backwards get your feet off the pedals and start running out. Try to keep hold of your bars and in control of the bike. If you can't hold the bike with you let it go and run to the side of it. You won't be able to jump over it.
To get out of a wheelie you should stop pedaling, pull your brakes softly or jump off.