My main email is Outlook on a Military Server. I create "auto rules" for my messages to go directly to a folder. The "inbox" is only for people I don't have folders for. That's why there really is not much in my "inbox"
On a typical day I will receive between 40 and 80 emails at work.
We have PST files and folders on our desktops that back up all emails...you'll never loose anything I try and do a complete back up every week.
I can't stand leaving emails in my inbox haha. I read and then delete them. If they are important then I'll archive them, but usually I'll just read and delete them. I have 10 emails archived, and none in my inbox.
I normally have about 200 in my inbox. I delete any spam that comes in asap as I check my email about 20 times a day. What I do is if I am lazy and I dont sort my emails in folders then I just make a new folder called Inbox emails as of and the date... lolz seams to work better that way.