How to sketch images from our minds?

I have just answered this question in another post, but as for a computer... I have no clue. Computer mouses aren't as accurate as sketching with a pencil and paper. There are some devices that connect to your CPU and has a mat, mainly to draw on, and a digital pencil which you can draw with. It may be expensive, but it is the only way i know how to accurately draw on the computer. Good luck crystal light. I just love saying good luck! GOOD LUCK!

It is very hard to sketch well with a mouse, unless you have the special "pen" attachment for the computer, but it can be done. I've done in in "Paint" accessorie many times with varying results.

I can't use a computer mouse but I have one of those electronic pads that you plug into your computer and you use a digital pen to draw on the pad and then it shows up on the computer screen. Its basically an electronic drawing pad. I'm not sure exactly what they are called at the moment but they are really nice!

It's there, or it isn't. I don't think someone can learn it. I paint from my mind, and I also am a silhouette artist. I cut out with a scissor freehand what I am thinking.