practice, practice, practice.
I am really left brained (logical, not creative), but have some great ideas I'd love to put on paper, but it's always sooo difficult.
a few semeseters ago I took a digital art class to make art with photoshop. I'd played with photoshop a bit before, so that's what interested me, because I really hadn't had any art classes before. I really liked it and became interested in Graphic Design, which is what I'm currently exploring.
I took a drawing class at school to develop some skills at the craft, and to help exercise my right brain, get myself out of the logical, forced, left brainedness.
Now this is the kind of stuff I draw:
practice, practice, practice. Like said before, try carrying around a sketchbook, and whenever you're bored or just have time, draw what you see. draw what you think, draw what you feel. it's really hard if you're left brained like me; i have tried, but can't bring myself to actually take advantage of having the sketchpad with me.
but I'm getting better
(as you can see above)