Ask HN: Best apps, hardware, services for seniors?

My parents are aging and I know I can help them in any number of areas--streamlining healthcare/Medicare choices, medication management, general help, elder legal services, landline with TTY, online banking, on-demand help, mobile phone, computer, etc...

What's totally clear to me is my parents are able to screw up what I see as impossible to screw up, so suggestions based on experience are the most welcome!