I just did this two weeks ago in mint. It's crazy to see how packing your own lunch and skipping coffee every morning can add up to hundreds of extra dollars saved every month.
Instead of skipping coffee, buy a nice travel mug (that keeps your coffee hot) and brew from home before heading out. My travel mug keeps coffee made at 7.45 warm until around 9 before becoming undrinkable. In addition, you'll be able to explore more expensive brands/roasts at low costs and find some new favorites!
You could just invest in a coffee maker / french press. You could still have you coffee in the morning without the much expense (just the capital investment in the equipment).