It\'s been eons since I\'ve actually sat down to paint but I can maybe offer a suggestion to help you. Practice drawing! I don\'t mean sit down and try to draw a picture of your pet dog, but do drawing exercises.
I\'m learning how to draw right now (or trying to at least!) and most of what I\'m practicing right now is pencil control. Hold the pencil like you would your paintbrush and just practice drawing straight lines, squares, triangles, circles, ellipses. Another exercise I do it draw squares made up of diagonal parallel lines or evenly spaced dots. It\'s just a matter of training your hand to go where your eye wants it to. Learn to focus your attention on the tip of your pencil/brush and it\'ll get easier.
You could also practice those exercises with a brush on paper.