Go to places where girls are likely to go (depending on your kind of girl, it might be a athletics field, night club, cafe, pub...)
MAKE SURE you look clean, nicely dress for where you are;
Check that your breath is fresh (better do that before you live home, and as a matter of habit anyhow);
Target a girl that looks nice to you (make sure is her boyfriend is not there too, though);
If you get eye contact, smile, come closer
Chat as best you can (like, be nice and a little fun if you can, no swearing, whingeing, etc)
find something in the person or dress to say something good about (like her eyes and hair might be nice, or her dress... etc.)
if it is a dancing place, invite her to dance
wait for hints she would like to see you again
get her number, email, etc...better to send her an sms or something when you get her number, just to test it's ok;
call next day or so, before she forgets.
Good luck if you get a date.
repeat the behaviour above and you might get another date... and eventually a girlfriend.