There's a difference between a high fat diet and avoiding fat at all costs. For me, the southbeach diet is a sustainable diet and for all that is written about low carbs, the real secret ingredient is accepting more fats in you diet as caloric replacements for carbs. While some fats seem to be better than others (e.g. Nuts) the simple evidence is fats 1) digest more slowly 2) satiate your appetite more that the equivalent calories in carb or protein and 3) metabolically don't produce more fat. The last factoid is intriguing. When processing carbs, metabolically, some pathways produce lots of triglycerides. Thus paradoxically switching fats for carbs leads to lower triglycerides. Your body is the culprit.
An amazing discovery I made is the wonder of adding a 1/4 teaspoon of virgin coconut oil to my morning coffee. At first it's a little weird since it changes the character of the coffee from being what your mouth feel for coffee is to something new. It's not worse it's just new and after a while it's a superior acquired taste. There's been an effort to commercialize this blend under the name "bulletproof" coffee. (which combines coconut oil, undalted butter, and extra caffiene in a blended mixture). I prefer it without the butter, and while I initially blended it that was too much hassle.
Anyhow the marvel of this is not the flavor but the effect i find. I can skip breakfast and have a later lunch. A lower dose of coffee last longer and I'm less spiked in energy level and there's no low blood sugar crash from the coffee (leading to binging in the lunch line). I'm not sure why. I think the oils play several roles. First caffiene is partially fat soluble so it acts like a time release. And second, the fats shut down your hunger faster. And third, the mixture with a little floating oil on it lends it self to sipping rather than swigging your coffee giving more time for the feeling of satiation to set in, and the urgency of breakfast to go away.
pro tip: virgin unsalted coconut oil ONLY! the expeller pressed (non-virgin) oils have no flavor or aroma. And salted coffee everyone knows is awful.
Anyhow if you try it, keep an open mind-- it's not bad, it's novel.
Bonus: Your lips will feel smooth all day.