How to reduce body fat properly?

• Go to IIFYM Calculator check YOUR appropiate daily calories
• decide which diet you want to follow, Low Carb, Paleo Diet, e.g.
• use Free Calorie Counter, Diet & Exercise Journal | MyFitnessPal.com to track your calorie intake for at least a few weeks.
• abstain from any industrial food (including protein bars e.g.), junk food, alcohol and sodas. Reduce sugar by a huge margin. Be very careful with restaurant food (especially salad sauces, e.g.). Cereals are industrial foods as well. Its presumed 'healthiness' is a decades old scam of the food industry.
• Never buy diet products, like low carb, sugar free, low fat, e.g.. It's usually terrible industrial food with a lot of artificial stuff with low nutritional value.
• Be careful with artificial sweeteners. Stevia should be okay.
• Learn about healthy eating and healthy cooking. For example here: Authority Nutrition - An Evidence-Based Approach
• Which means you have to prepare your food yourself with fresh (or frozen) veggies, good meat (like turkey), fish and some non-refined carbs like steel cut oats.
• Use healthy oils like olive oil extra verging, flaxseed oil and coconut oil.
• If you eat fresh, healthy foods you don't need any supplements. During my diet I just took a multi vitamin,  more for psychological reasons than anything else. :-)
• Weight in weekly - not daily.
• Bet on your weight loss at www.dietbet.com or similar websites. I used stickK. The thought of losing money did help me to overcome temptations at social events with a lot of alcohol and food around me.
• Become a member of Fitocracy. I found the information and support really helpful and rewarding.
• Ignore all diets which are based on any supplements or 'special' or 'super' foods. It's often a scam and it's all a part of  money making schemes by the billion USD diet and fitness industry.
• Anyway, what ever you do, a huge change of your eating habits awaits you, hopefully for many years to come.

IMPORTANT
Choose the diet that you like most and which suits  best in regard to your life (style). There is no secret diet solution or magic diet. Diet fads come and go. Currently the Paleo Diet is In while Atkins is Out...