Do you sign out?

I know it's not just me who have dozens of online accounts (with some I even forgot I had opened) because for some reason you have to sign up for an account for every little thing. Even online news sites, browsers (such as firefox, chrome) and almost every website you go to, you can sign up for an account and some you have to sign up or else you can't use their service.
    Signing up for an account means you have to make up a password which I never seem to follow the rule about having a number, a capital letter, a symbol in the password to make it harder for other people to guess and get into your account. But with all the ways a hacker can get into your accounts through the websites/web services you use, does complicated passwords do anything? Still, with so many accounts, there would be so many passwords to remember. I don't remember most passwords to most of my online accounts. I put some of them on paper which is foolish but I can't remember them so what else to do?
   For safety, when you use other people's computer or whatever gadget to get into any of your online accounts, it's a good idea to sign out but with your own computer, most people don't bother. I usually stay signed out of all my online accounts because I don't use them often. For email, I sort of keep signed in but once in a while, I sign out so I can use the password so I wouldn't forget it because I forget easily. But overall, I think it's better to sign out after every use. But it really is so much easier to just stay signed in.

How about you? Do you stay signed in into your online accounts or do you sign out after every use?