The problem with this advice is it doesn't take onto count the Glycemic index of the fruit. Case in point - Watermelon and Pineapple. While it seems reasonable to say eat as much fruit as you want, both these items very high glycemic values - above 85 out of a 100 point scale.
Why does this matter? High glycemic foods cause a spike in your blood sugar - this causes hunger, among other things.
The best 'hack' to controlling your hunger is to manage your blood sugar level. By avoiding high glycemic value foods you will curb your hungry. By eating low GI foods you will eliminate your hungry whenever you want. low glycemic value foods have the opposite effect - this is the way to completely control your hunger as I do.
For example, I eat a handful (about 8-12) Almonds when I'm hungry (esp. at night). Almonds have a very low glycemic index, and just eating a small amount will stop your hungry/craving. But it's not just almonds - any low GI value food will have this effect.
Some other suggestions on great low GI snacks:
Apples,
Cherries,
Strawberries,
Raspberries, Blueberries,
Grapes,
Peaches
Non-Fruit low GI:
Almonds (but not all nuts),
Yogurt,
Lean Chicken/Turkey,
Tuna,
Black Beans,
Brown Rice (much better than White Rice),
High Glycemic Foods:
Refined sugars (aka anything baked),
Watermelon,
Pineapple,
Jams,
Bananas
Keep in mind you shouldn't try to eliminate these foods, but if you are cutting weight then it's good to avoid eating too much of a high GI item to manage your hungry. Personally I try to avoid them still (after losing/getting back into shape), because I never have a desire to binge out anymore.
Incidentally, I recently lost over 24 pounds in 6.5 weeks using these food hacks. I also started playing hockey again (one of the hardest, most thorough workouts out there it turns out), and that caused me to want to be in better shape, so now I'm working out a lot more too. I'd suggest adding in activities you love, hiking, mountain biking - whatever it is just be more active.
Anyway, I discovered this GI 'hack' from my biz partner who is a gym owner and a nationally ranked crossfit athlete, hope that helps!
Good luck!