Ximimark 5Sets WeMos D1 Mini Prototype Board XD-08 ProtoBoard Shield Double Sided Perf Board for Arduino

What can you say about these? It's basically just a bunch of holes in a circuit board. You just use those holes to mount your components with solder, and then use jumper wire (or solder bridges) to connect those components to your other components. In a nutshell, it's a permanent breadboard.What is nice about these, is that they're marked in exactly the same order as my ESP8266 so I can still see the pinout from my ESP8266 while this board is on it. It also adds a pre-connected hole next to each pin so you can just solder your wire into that hole to connect to the pin next to it. It's not hard to jumper, but it's a nice touch. It also comes with every header I could think of, so no matter which header I put on my ESP8266, I can find one that matches. You can even make them stackable and use multiple protoboards if you want.

Makes things easier

Clean way to add small custom circuit to d1 mini