I am surprised no one has told him to find a nice long smooth gradual up hill to practice on. Start slow, low, and short. Practice every time you go riding and eventually you will get, if not good, at least OK at them. I practice a bit every time I ride and now after 35+ years I think I am almost up to "OK" as far as wheelies go. I am really glad I have practiced. A few months ago I was riding by buddy's YZ250R at the track. I have very limited time on 2-strokes and as I was "putting" through the pits the power hit and I was in a wheelie. As the front wheel came up unexpectedly it threw me back which caused me to grab some more throttle and wheelie even further. I ended up wheeling the length of the pits. Other riders either thought I was a jerk or possibly a show off or possibly somewhat skilled. I am sure they all wondered how a guy can wheelie the length of the pits yet still be the slowest guy on the track.