I’m using breadboards quiet often. When it comes to breadboards most tricky (at least for me) is power supply.
Yes of course you can just use two cables, but I was looking for something smoother. On the internet you can find lot of versions of breadboard power supplies. Some of them can switch between 3.3V and 5V, but I’m not using 3.3 that often so I’ve decided to go with 5V and actual input voltage. You can see result at the pictures it works pretty well.