I've been struggling with how to manage emails as part of my system. In particular, whether to treat the email inbox as simply a collection bucket with actionable items transferred to my GTD spreadsheet; or, to set up folders within the email client eg. action, waiting for, reference folders etc. I've gone for the former approach for now and just archive my emails once they're processed so that all my action lists, waiting for, someday maybes, read/review lists etc are all in one place - on my spreadsheet. I fear that creating separate folders in the email client will lead to two separate GTD systems - one for email and one for everything else - with a greater risk of missing things and increased user resistance. Thoughts?