I have a super efficient email process;
1) use gmail 2) any email which is important I click on and read 3) everything else remains unread
Most of the time I can get everything I need from an email from what is shown in gmail's inbox view. I currently have 8,212 unread messages in my inbox. I like seeing that number get bigger and bigger, as it is a kind of score board of how much time I've saved by not using a process similar to the one described in this submission.
Why spend time manually archiving when I'm just going to search to find anything from the past anyway....