One thing I discovered recently is Wunderlist. After using it for a few weeks, I can say it’s absolutely brilliant if you have an endless list of Projects with Tasks / Subtasks that need prioritising, and re-prioritising regularly.
Great bit of kit, with a very good free plan that syncs with all your devices. If you’re fed up with the crappy Snooze functionality of the Mac Calendar, and Notes / Reminders doesn’t do it for you, I’d highly recommend this.
Comes in Mac / Windows / iPad / iPhone flavours (and I guess Android too, just haven’t checked)
Check it out at https://www.wunderlist.com/en/
I haven’t cross-tested this with ‘Things’ for the Mac, but I don’t think I want, or need to after using Wunderlist.