How do I make this as easy as possible for everyone?

What kinds of things should I be doing to make living with this easier for my loved one? Do I just go along with things even if they're not correct? Do I correct and bring up to date with current topics? Do I just let them live in the past?

If you are a caregiver, there are lots of resources out there. I'd suggest starting with a local, live support group where you can find practical tips and answers to these questions from professionals as well as from folks on the front lines , like you.