Too much!
Why ohh why did I ever let my inbox grow to over 900 messages? I'm normally fairly good about cleaning it out. Usually, once a week, I sort everything into subfolders and delete all the quick little ones that don't need to be saved. But recently, I haven't been keeping up on this habit. The problem is, slip on it one week, and the next week you're like "ugh, I don't want to that now... there are a bunch of them... it'll take forever" so then you let it slide a few more weeks and that is where I am today.