A copywriter needs something to work with, like what his customer need, you know. A writer doesn't :P!
A copywriter is writing in the name or for the customer. A writer does that in his name or for himself.
Are you out of gas already? Start a project ;).
If you are at it,
I'm a reader btw, I expect to be amazed, not to be sold :D.
P.S. Some of the motivational crap is actually working. I listen to Jim Rohn these days.
P.S. I know, is a lot easier to judge than creating. Don't go on my blog, it's really bad, transitional stuff mostly.
A copywriter sells something. Usually a product.
A writer sells something. Usually emotions and ideas.
There are technical differences, but my point is if you can write good, then you can do copywriting.