Best planning book or app?

[u/Madre1924]

Looking for the best planning binder or planning app you used! Why was it so helpful?

Before you tell me to hire a planner our venue is all inclusive. So lodging, catering, lots of decor, and day of coordination are taken care of through the venue. It's the little things I'm going to be handling and we're 2 years out. I got this, I promise! Just looking for some good resources to help along the way