a. Do 40-45 mins of cardio 4-5 days in a week
b. Take up weight training and train with weights 3 days in a week(whole body workouts are better)
c. Eat a bit lesser than your needs. And watch your macro nutrients. Eat high protein, moderate carb and low fat diet
d. Drink plenty of water
e. Sleep properly. Cos without proper sleep you wont be able to work harder to reach your goal.
f. Track progress every week and make adjustments to diet, workouts etc based on progress. For eg.. u lost 2 lbs in first week and only 1 lbs in second week, then increasing a little cardio would be a great idea.
g. 2-2.5 lbs weight loss per week is is the maximum that you should try for. Don't try to lose more than that as you may take your health to a toss.