Step 1: Find a calculator that will help you determine your ideal daily caloric intake for weight loss (usually around 15%-25% beneath your maintenance calories)
Step 2: Eat a balanced diet with a healthy ratio of carbohydrates, fats, and protein. Drink plenty of water.
Step 3: Do some basic resistance training in order to preserve your muscle mass while on a weight loss.
Step 4: After you're satisfied with your weight, increase your daily caloric intake back to maintenance and keep doing steps 2 and 3.