Mise en place is essential in my mind and one of the most important skills I learned early on in culinary school. At home if you don't want to dirty a ton of dishes, you can organize ingredients (veggie ones anyway, still need bowls for spices/liquids) into small piles on your cutting board. Then just grab a bench scraper or the side of your knife and toss the ingredients in as needed.

Also, get a kitchen scale. You won't need it all the time but it's so much easier to just stick a pot on top of a scale and add 500 ml of chicken stock than it is to have to measure 2 cups in a separate container. This is especially good if you're looking to blanche/simmer something in a flavorful liquid like stock or broth