1: learn to use the pen tool, and nothing else. that is the most important bit for 'modifying' on photoshop.
2: get onto here: http://www.digimods.co.uk/tutorials/tutorials.htm
. taught me pretty much everything, after you know all this its just practise to perfect it.
3: when you have got the hang of number 2, try these tutorials. some of them are brilliant. http://www.photoshopchop.com/tutorials/
how the hell does a blind person actually drive? does their guide dog bark once for left, twice for right and go mental when he needs to brake?!
Kill List: Moped, School bus, 4 Cyclists.