Bee and I have been doing Whole30 lately, where we cut down on sugar, grains (gasp!), alcohol (double gasp!) and additives/preservatives 30 days. We're 20% done, and it's been a good experience! Bee has a lot more energy (mine is about the same) and we've both lost a surprising amount of weight.
There are no daily calorie limits, as long as you eat foods that aren't in the list of foods to avoid. I really miss having mayo on veggies for an evening snack though! Hellman's has a lot of additives, so if I want to eat mayo during this month then I need to make some by hand.
It's supposedly really easy to make and online comments rave that it's crazy delicious. I've been eying this recipe, and plan to make it soon:
http://whole30.com/2014/05/mayo/
Have you ever made your own mayo?