Little tip:
Have a system of storing your everyday tools that you repeat every single day.
I have always worked this way, but did some work with another plumber the other week, and realised he didn't do as I do.
It's all about repetition so it becomes second nature. I clip my van key with a carabiner to side as soon as I leave the van. Phone goes in pocket on left thigh. On my key ring I have a vent key, a meter key, and a washer that I can use to isolate ballafix valves in a pinch.
All my tools in the tote back go back in the exact same place every day. So does everything else in the van. So when I need something, I know where to place my hands to it straight away. How people don't work with this system is beyond me, but if you are one of these people. Adopt a system and stick to it. I do it as by nature I am a skatty forgetful person. So if I don't have a system I end up leaving tools behind, losing stuff, and generally more stressed.