How to tell which sites are affected by the Heartbleed bug
… and enter the site’s address in the search box. It’ll tell you if the site in question is still vulnerable or not.
If a site you use every day is not affected, it’s a good idea to change your password for that site now that it’s patched up. Assume it was vulnerable at one point and is now okay, just to be on the safe side.
If a site you use every day is affected, it’s best not to log into it until it’s been patched. If it’s a site that’s affected but you don’t log into it with a username or password — like, if it’s a site you go to read news or look at cat pictures or whatever — then you should be okay. Still, be vigilant.
source: Time Magazine