You will need a pick and a tension wrench.
Art is of the inside of the unlocked lock
//_ //_//_// <pins up
//--//--//--// <locked pins
_-_-_-_-_-_ < keyhole
The idea of the tension wrench is to keep enough spin tension on the barrel/keyhole that the pins don't drop back down as you rake your pick across it.
To much tension and the pins will just lock in the position they are currently in and will be unable to unlock until you release some tension.
Now what does it mean to rake ?
It is one of the easier pick methods.
when you out the pick all the way into the lock and rake back on the pins like you are rakeing leaf upside down.
Now keep practicing. Practice makes perfect in this art.
Practice on padlocks before moving up to door locks.
More lessons to come...
Feel free to ask questions.