Why don't u find out:
The link above should suffice. If you follow at least half of the items on that list, you should be good to go. For starters, you could do the following:
1) Have a bold logo
2) Use big san-serif font
3) add "beta" to any new features or headers on your site
4) Use rounded corners for your container DIVs
6) Photo gallery using lightbox
7) On your forms, make sure you are using large text boxes.