Remember those things I said are universal to the pursuit of science? I found a couple more items…
#3 A really great travel mug.
Because face it. You need coffee. A LOT of coffee. But everytime you get a cup of coffee from your favorite terrible coffee place, someone comes and asks you a question about experimental methods before you can drink it and then you have to fix a microscope for someone else. So a travel mug becomes critical to the pursuit of science. Look for one that has a) adequate volume for your coffee drinking habits and b) top-of-the-line insulation for maximum drinkability later (because cold coffee and hot coffee are both great, but that middle range is really quite aweful).
#4 An extra pair of pants.
For when you spill a large volume of really-hot-even-though-you-got-it-hours-ago coffee all over the pair of pants that you were wearing just before you have to meet with the boss. An extra pair of pants can be extremely useful.