When customizing a shelf layout, I start by getting everything together that will be packed in it. I look at what would go together on a shelf, needs a shelf of its own, and what could be grouped together in a drawer. I find that Sterlite plastic baskets work nicely as a drawers and are readily available at many stores.
I then use cardboard to mockup the layout and sizing. This is an easy, cost effective and quick way to test clearances and try out different ways to organize things.
Once I have a layout, I use a corner block building method to keep the weight down. It’s not as eloquent from a woodworking standpoint, but it provides for solid joints when using thinner plywood. Why use 5/8â€