I think should be thought of like this: What is the best way to stores- Easy yet Secure, a big box of gold.
Easy yet Secure in this case are oxymorons, just like Easy yet Secure tends (some software addresses this) to also be an oxymoron. It can't be both. If it's easy to use, it's not so secure. If it's secure, it's not easy to use.
Ye, I am aware of this oxymoron. But I am an engineer by profession: every problem has a solution. We just need to find it.
Point noted. I too would like an easy and secure solution.
EDIT: I run terrawallet.com, and one thing I had been thinking about was multi-sig accounts for every account holder. Where to send money the private key from both the service and the user would be required.