get a bobby pin and a screwdriver first do whats called raking the picks use the bumpy side of the pin and rub it once or twice on the top of the lock then slowly try to put the pins in the correct position by pushing on them while doing this slowly turn the screwdriver in the lock dont expect to get it on the first try....or just bust the lock;-)
If you're trying to open a door to your house, then lockpick the door somehow. Or destroy the doorhinges and the door will fall down. Use something blunt to break the hinges. But be careful, the door might lean and fall towards you.