hmmmm...that is simple.
if u have an idea first u vl draw it on a paper.then on other things.
if u can draw better or u hv good sketching skills u could easily translate ur ideas.to others
is this satisfy u????hmmm!!!!
when you start making ur idea in autocad or some other wid out sketching u vl only b confined to some shapes.(ek dabaon mae rah kr hee rah jao gae) .
but when u sketch freehand u vl hv an elaborate opions for ur ideas.