There are many benefits to eating seasonally, not least that seasonal produce is a real culinary treat for the tastebuds. By enjoying produce when it is in season, we fall in with Mother Nature's natural, and intended, culinary calendar! It tastes the best and it is the cheapest - naturally, the supply of seasonal fruit and veg, will outweigh demand, especially if their is a good harvest. Why wouldn't you go with the seasons?
Read up on the subject, get to know your food. Plan, not only what you will eat for breakfast, but also snacks, lunch and dinner; I am a big fan of planning meals in advance by making stocks for freezing or eating healthy leftovers the following day.