install and use split browser to either select elements you want to email (images, text, segments or entire page). open your email compose page in a tab. then simply drag and drop what you want to email from the split pane onto your compose field.

voila!
shweeet.

but the simplest, no hassle, one click way that i know of to share websites with someone is via the toread service, which actually was set up as a kind of bookmarking service.

simply have your friend set up their bookmarklet with toread, then have them send the link to you. you then put it in a folder on your bookmarks toolbar, change the name to the name of your friend, then when you want to share a page just click your friend’s bookmarklet, and that’s it. nothing else to do.