The main strategy for losing weight while doing regular rides is eating small meals (NOT JUNK FOOD). Spread your meals out to 5-6 meals a day. At my place of buisness I start at 7:30, have two breaks and a lunch break and get off work at 4:00. I eat a small breakfast, half a granola bar on my first break, usually a sandwich for lunch, the other half of my bar for my second break, and then eat a diverse (fairly hearty) dinner all while drinking only water all day, and sometimes some tea or juice with breakfast or lunch. It works well with my workouts/regular riding.