Calorie restriction is by far the most important factor. Everything else is secondary. Various ways to achieve it but usually the one that is the least disruptive will be the most sustainable in the long run. Stay away from fad diets.
Cardio is quite helpful and resistance training further accelerates shedding excess weight. I haven't seen the inside of a gym ever (which will be corrected next year if time permits ) but just working out at home (mostly bodyweight exercises and minimal equipment ) was enough to result in a noticeably better physique.
After walking and jogging (indoors) a few thousand kms over the last 3 years I finally started jogging outdoors 10 days back and in surprisingly quick time my body has adapted to it's rigours.
Cocumber & Watermelon Juice
Spinach
Cabbage
Watercress
Fruit Apple + Sweet Lemon
Oatmeals
Roasted chana
Rosted Corn/Maze
Green Moong & Gram Sprout
Chana & Toor Dal Rice Khichdi
Water