Start by keeping a food diary for a week.
Write down every thing you put in your mouth for a week, the time you eat, how much you ate, & be honest. Then after the week, analyze it, & see what you can do without, what you can cut back & what you can eat differently & then do a week of the same. Count the calories and see the difference. 500 cal less/day equals 26 # loss per year. + exeercise!