...don't give in to the temptation! I've found that I'm much better off grocery shopping than eating at restaurants, cafes, and even food marts.
For instance, yesterday I was starving midday and needed something to hold me over until dinner in between volunteering and working, so I stopped to grab a small coffee and Snickers bar at a cafe. I spent over $7 on it, which would have been $4 tops in the States. The Snickers alone was $3.50. Soft drinks and coffees are nearly $4! Things are double the price and I'm quoting these in AUD (which is essentially equivalent to USD).
Overall, high prices have led me to ask myself regularly, "Do I really need that or do I just want it?" This type of conscious decision making will be beneficial when it carries over into my life back in Chicago once I'm back, too! Win-win.
In summary, shop at a grocery store as much as possible or at farmers markets and always carry a snack on you; otherwise positive decision making skills diminish as hunger elevates.