First, whenever you travel, you should try to bring some breakfast food with you. You can consider taking dry oatmeal packets, cereal and breakfast bars with you, as this will allow you to save a decent amount of money. Even if you eat breakfast out half the time when you travel, you will still save money.
Next, consider staying at hotels that provide a kitchen or kitchenette so that you can make your own meals. Making your own meals will save you a ton of money, as opposed to eating out all the time. Even if you choose to dine out for every meal, you should try to select food items that you like and are available at cheap rates. Do not go for sophisticated and high priced meals.
Another way to save money on food while travelling is to do a search on restaurants in the area you will be travelling in before you go on your trip. If you have the opportunity to see what restaurants are in the local area you can plan where you will go and you will be able to stay within your price range. If you don't have a plan you will end up choosing restaurants on impulse, which can lead to spending more than you planned.
Last, to save money on food while travelling, you can look for different discount gift certificates and coupon websites online. Check if there is any discount you can avail at the places you plan to visit during your trip. Most of the websites offer you the option to enter the zip code of your desired area and a list of restaurants will pop up on your screen. You can check for the discount offers before leaving for your trip, or you can also check for them when you are in the particular area.