My computer runs 24x7 and I do not log out when I am away, but I do shut Safari down when I am not using it. On an often repeated recommendation from my bank (USAA) when I leave ANY financial site after I log off of the site I quit Safari, or whatever browser I am using even if the next thing I am going to do requires me to relaunch Safari.
Not to quarrel with your use of an Excel file to store passwords but the App Store catalogs nearly 130 dedicated apps for secure storage of password and other data. Thirty-six of them are customer rated at or above 4 stars. Many of them will even generate secure passwords for you.
If we knew what it was we were doing, it wouldn't be called research, would it?
