I would use the word Food Habits, rather than the word Diet.
The following Food Habits will work best.
What to Eat
Eliminate Fast Food, Junk Food and Sodas of ALL KINDS
Reduce Intake of Simple Carbohydrates (White Rice, White Bread, Flour…)
Get your Carbohydrate Requirements from Complex Carbohydrates (such as Oats)
Ensure you have a Good Amount of Protein with ALL YOUR MEALS
Dietary Fat is good…it will NOT make you Fat. Avoid the Trans Fat variety though.
When to Eat (and When NOT to Eat)
Do NOT SKIP BREAKFAST
Do NOT SKIP ANY MEALS
Include a Good Amount of Quality Protein with your BREAKFAST (Reiterating from above)
Include a Good Amount of Quality Protein with ALL YOUR MEALS
Have a 4–5 hour Gap Between Meals …. DO NOT SNACK ON ANYTHING BETWEEN MEALS
Eat your Dinner Early (say by 6.00 to 7.00 pm)
DO NOT SNACK ON ANYTHING AFTER DINNER, BEFORE YOUR BREAKFAST the next day.
Did I say…DO NOT SKIP BREAKFAST
Other than Food/Nutrition, make sure you have an Active Lifestyle. This includes your Day-to-Day Activities as well as Working Out.
And, do NOT let Stress get to you.
With all the above, you should lose weight, fairly quickly.
Hope this helps!