hi, this may be a bad question but i want learn sketching and i have no idea about sketching site. as i think this is better things for a web designer to have knowledge about sketching.than have you any reference site for this.any good eBook or tutorials. which may be helpful for me. i am beginner and want to basic knowledge of sketching,
In regards to your comment, if you want to make page mockups/sketches, instead of doing it by hand, I'd highly recommend trying this site out: Balsamiq Mockups - click the "Try it now" link.
I believe the online version is free to use, as far as I know, but the desktop version looks a little pricey.