The phrase "I wish I could quit you" takes on a whole new meaning when you want out of a relationship with an internet service.
You should not have too much external links on your website.
Other wise this will affects your website negatively.
It's very important to use pictures on your website to bring up the main concepts of your website. Search engines understand the pictures by their alt tags.
If there is no alt tag, search engine doesn't understand anything from the image.