Got a diet dilemma? Ask a true diet pro: an RD, or registered dietitian. Her job is turning complex nutrition research into doable plans for real people.

Here's what they told us, in their own words. These tips are solid gold, learned from successful experience with thousands of clients. Some tips are new. Some you've heard before, but they're repeated because they work. This treasure trove of RD wisdom could change your life-starting today.

I Can Only Handle One Diet Change Right Now. What Should I Do?
1. Add just one fruit or veggie serving daily. Get comfortable with that, then add an extra serving until you reach 8 to 10 a day.

2. Eat at least two servings of a fruit or veggie at every meal.

3. Resolve never to supersize your food portions—unless you want to supersize your clothes.

4. Make eating purposeful, not mindless. Whenever you put food in your mouth, peel it, unwrap it, plate it, and sit. Engage all of the senses in the pleasure of nourishing your body.

5. Start eating a big breakfast. It helps you eat fewer total calories throughout the day.

6. Make sure your plate is half veggies and/or fruit at both lunch and dinner.