If you want to lose weight, cut down on carbs and sugar. This includes those "healthy" complex carbs you always hear about--wheat, black beans, whatever.
Eat more vegetables, and eat plenty of healthy saturated fats.
Yes, saturated fats.
I switched to eating more coconut oil, avocados, and eggs, stopped drinking pasteurized milk and eating bread, and I lost almost 20 pounds. I started drinking raw milk (good luck finding it in Oregon, it's illegal to sell on the market). And I barely exercised. I went to Chipotle and ate their vegetarian salads (because of the guacamole) like every other day. This is how I started changing my eating habits.
If you have Netflix, watch the documentary Fat Head. It debunks the Supersize Me documentary. It's brilliant, and explains why low-fat and "diet foods" make you fat.
An excellent read is also Never Be Sick Again by Raymond Francis.
Dr. Joseph Mercola's website
www.mercola.com is also excellent.
I'm not a nutritionist, but those are my two cents. The USDA has perpetuated the high-carb myth for decades, and falsely teaches that saturated fats cause heart disease because of high cholesterol.
The quickest way to lose more weight is to eat more vegetables and healthy, saturated fat. And CUT OUT SUGAR.
I lost weight, and my skin improved, too!