Hi there JoeySosa
You can either do it by hand or use a plugin that is designed to do so. (but like chrisjbirchall mentioned, there are lots of way of achieving this)
1.
A quick way of achieving this,
If you want to have the drawing in black and white, use desaturate (image – image adjustment – desaturate)and then open the filter gallery and apply the ‘poster edges’ filter found in the artistic folder.
Just play around with the sliders until you get the result you like best.
2.
Use the Sketch master plugin from A company called Redfield. US$39.90 but worth every penny if your planning to do some serious sketching 😉
More info can be found at <
http://www.redfieldplugins.com/>
Hope this helps,
Rogier.