Safari Extensions are not as well known as Google Chrome Extensions, but they are every bit as useful. A browser extension is a little script wrapped up into a button or toolbar that adds extended functionality to your browser. Go to https://extensions.apple.com to peruse the many available extensions.
Three that I would recommend:
1) AdBlock -- Blocks most advertisements on websites. With the click of the toolbar button, you can add safe domains and ensure you see ads on a particular site.
2) ClickToFlash -- I hate Flash. It sucks up CPU power, and drains laptop batteries. ClickToFlash disables all Flash elements on a particular page and leaves you with a little "Flash" button in the middle if you choose to enable a Flash element. You can also add websites to your "whitelist" so they always display Flash.
3) Print Plus -- Anyone coming from Windows and Internet Explorer loves the "Print Selection" option, which is mysteriously missing in Safari. Add this extension and it's back, but with a twist--you can select individual elements to print on a page. Simply press the toolbar button and start clicking on the page elements you want to print.
One more for developers and designers:
Coda Notes -- Clicking the toolbar button on the page brings up a sort of "annotation toolbar" allowing you to highlight areas on a web page, add sticky notes, draw lines around things, and even edit the text of the webpage itself. This could be useful in giving feedback to a programmer/developer or designer.




