One of the easiest ways to share things from around the web is the Press This tool. What it is, is a little bookmark to go on your internet browser.
As you browse articles all over the internet, you can use this bookmark to grab and post text, images and videos from other sites to this family site.
Whenever you are on a website you like, simply click the PressThis bookmark and a window will pop up complete with images, videos and a ready made link with the title of the page. You can add a note or post as is. You can save it as a draft, and work on it later. For large blocks of text, I find highlighting it, and then pressing the bookmark will grab the highlighted text and put it in your post. Go ahead, give it a try.
You can find it on your dashboard under the Tools Menu.