Free-hand drawing and fixing "squiggles."

undefinedundefinedundefinedHi, guys! I would like to know if there is a way to draw free-hand in photo shop, and if so, which tool do I use?

I'd also like to know if there is a way to "fix" lines and curves. For example, if you take a pencil and draw an image free-hand, it's nearly impossible to get straight, unless you're a brilliant artist or use a ruler. If I drew and image, scanned it and opened it in Photo shop, is there a way or tool or something I could use clean up the lines, make them straighter (without the squiggles) and make certain lines broader or thiner?

Thanks for the help!

hi there,
i think you should get a wacom intuos, scan your sketches,,,then do corrections etc on a new layer..you can then erase what you want on the background layer. to get perfect curves you might want to get into the pen tool. straight lines are easy enough...use just about any drawing tool...press the shift key as you draw your lines will be straight. check out photoshop help it is all in there.

Thanks so much!! You're reply helped me lots.