It's in fashion to have a lat "Tare" today 
I tare my late each morning before weighing it. Sets a nice base weight.
I do the same when weighing out my food. Each container is a different weight, so I tare it before weighing out my food.
Seemed like a natural progression to tare my late each morning as well.
That way I know exactly how much mass I gain on that lat each day.