I'm 45, 5-11, 156.
Here's what works for me:
1. Green smoothie (kale, spinach, mixed greens, cucumber, OJ, frozen banana, protein powder) and eggs for breakfast. (Eggs are scrambled, not part of the smoothie.) Plus a shot of apple cider vinegar.
2. Chicken or fish with green veggies for lunch and dinner. (I eat at Chipotle frequently -- Burrito bowl of minimal brown rice, black beans, peppers/onions, chicken, mild/medium salsa, guacamole, lettuce, cilantro).
3. Snacks of apple slices with peanut butter, almonds, and whey protein drinks that are basically chocolate milk.
4. Drink nothing but water, often mixed with lemon juice, and the occasional glass of wine.
That's 95 percent of my eating, with the occasional chocolate splurge. I had eaten pretty healthy for a decade but drilled down to this in September 2012 when I wanted to lean out for a Halloween costume. I got so used to the simplicity and convenience of the diet that I've just stuck with it. I get everything from Costco; Chipotle is next door. I went from 167 to 151 initially by Halloween 2012, but have leveled off at 156.