Build muscle. Muscle burns fuel at a higher rate than fat. Even people who are not overweight can have a high body fat percentage and that can definitely slow your metabolism. Resistance training and lifting can both help build muscle. I do it all at home with a weight bench, push ups, squats, planks, dips etc. you get the idea. On alternating days I run, or go hiking or do some form of cardio. I make it a point to move every single day. Working a sedentary job is hard on me and it will kill your metabolism. It isn't so much about when you eat. I do not eat breakfast, I am not a breakfast person. If I try to force myself to eat breakfast because everyone tells me I "should" do that - I end up in a cycle of cravings and eat more throughout the day. Does no good to boost metabolism that way if you shoot yourself in the foot doing it ;)
Balanced nutrition - learn about macros and how to hit them - the right balance of protein, fat and complex carbs.
You can't target fat loss to specific areas, to lose the lower tummy pooch lift heavy stuff and do cardio. Just boosting your metabolism isn't going to help and don't fall for tricks and gimmicks. Change your exercise routines. If you are too used to what you are doing, your body wont' get the burn you need to lose the stubborn fat.