Windows 7: Should you always log out of Websites?

Well I'm signed into seven forums on my phone and it's never signed me out on there either.

For what it is worth I stay logged in to sevenforums/eightforums. Nothing else though.
Check marked the box for "keep me logged in".

My IPS has my mail server with spam collector. I sign-in in the morning. It auto logs off when I shut down the PC in the evening.

Banking, Paypal, log off when I'm done.
Newegg and Amazon I'll log in if making a purchase then log out when done.

It "feels" safer.
I only store my password for seven/eight forums on the PC.
Clean all the temp files on a regular basis as others have mentioned.

My 2 cents.

The only sites I bother logging out of are those connected with my financial transactions i.e. banking and credit card.

I've never logged out of Seven Forums, but do have to sign in now and then if IE9 hiccups and resets my login details.

Thanks for all the input everyone.

I've been on the internet for over 10 years but never really thought about cookies/staying logged in. I've just gotten so used to logging out that I never even thought to look into whether or not it would be ok to stay logged in and keep cookies.

Only took me 10 years to ask!