I keep my always delete on exit, online transactions tends to make a person paranoid although i do keep info on my desk so i guess anyone that broke into my house wouldn't need to be a hacker to get such info or my 13 character long case sensitive alphanumeric passwords to several things.
I keep all my cookies, never empty my temp internet files and leave my PC unguarded without a password and all my bank details are in a text file on the dektop in a file called "really important stuff".
Now I really must be getting a move on, I just got an email from a nice man in Nigeria who wants to give me $25 million.
wrote myself a nice little program that will erase cookies, temp internet files and history every time i restart, so i restart every 3 days and that's it...
I have my adware scanner (SpySweeper) configured to know about 2 dozen cookies that I allow (my bank, tvguide.com, tomshardware.com...). All the rest get flushed.
No need to. My IronKey takes care of that. I am totally invisible when I am on the net. They have a feature called Secure Sessions which is very secure. It automatically stores your log in credentials as well. If I don't use it, I have mine to clear after each browser session. Then of course CCCleaner cleans up pretty well!
Norton 360 does it automatically to my discontent.
That way I need to re-login every hour on forums, or relogin on my email address every time I log into it...
But at times it catches some bad spam cookies too.
I delete them every few days as part of a general system cleanup (done automatically with CCleaner). I'm not worried that much about privacy, but I am a neat freak obsessed with getting rid of every extraneous file!