Eg: Mow my lawn on Sunday? Ok, I'll create an all-day event on Sunday to mow-my-lawn. And once I'm done, all I have to do is delete it. I can then periodically check my calendar from my phone/laptop/tablet, and see everything I have to do that day/week. If I want to get a head-start on anything that's coming up next week, it's all there on my calendar too. If I need a reminder, I can just have it send me a push-notification at a specific time. Best of all, I never have to be at my computer to get all these info/alerts. As long as I have my phone nearby, I can check my tasks, and get reminders for anything I've forgotten about.