What is the best way to get into a rhythm of eating and cooking at home?

i am trying to save money,and i want to get into the rhythm of eating and cooking more at home. However, most times i come home i am just lazy and would rather go out and get something aat mc'ds which then makes me throw out expired food in my refrigerator. what is the best way to get into a rhythm of doing this? i am not an adventurous eater by any means, but i do have pots and pans!