I've been using LastPass for a while now and it's so simple. I can't believe I went so long without using it. Their password generator is awesome, as well.
I might be wrong, but I also don't think LastPass was affected by the Heartbleed Bug? I seem to remember getting an e-mail about that.
Another great thing about using a password keeper, or some other type of password storage, is that it's incredibly easy to go through and change all your passwords if a situation like this happens. You have your "vault" that holds all of your passwords and you can go through quickly and change them if need be. Incredibly easy and makes you feel a lot safer, and secure.