At work, I just use email. Whenever I check my inbox, I delete all emails that I no longer need or are irrelevant and I trim my inbox aggressively. All emails l

At work, I just use email. Whenever I check my inbox, I delete all emails that I no longer need or are irrelevant and I trim my inbox aggressively. All emails left there are things that I have to do. I recently switched to this method after having an overflowing inbox with 30 folders and all kinds of filters, etc, and I'm already seeing a huge productivity increase. Still, I fully appreciate this won't work for everyone, especially those who are getting 100s of emails per hour.