Eat small, healthy portions more often throughout the day. 3 square meals is not what you are looking for. 6 small meals leaded with protein and fiber coupled with small healthy snacks in between will help you maintain a high metabolism while keeping insulin levels at their optimum range. This strategy is guaranteed to send your body into fat burning mode.
Don’t spend hours working abs. It’s not about the workout as much as it is your diet. You really want to maintain an overall fit body and not just your abs. You can really focus hours on abs with ZERO results if you are not eating right. Work your abs 10 minutes a day and focus on fat burning through healthy eating and cardio.