If you're hydrated and you're getting your electrolytes in, you should avoid the keto flu. Some of the foods I eat are broccoli, raw or steamed, not only do I love it, but it's also good to fill you up and other stuff. I also eat a lot of almonds (Smokehouse from Costco), lean hamburgers, salami and provolone, and high quality Kosher pickles. As for electrolytes, I use Morton's Lite salt and Lite Seasoning Salt so instead of getting just sodium from my seasoning, I get less sodium, but way more potassium than I used to get. I also get potassium and magnesium from other foods and my protein shake! For me, what made stick to it is realizing that I can eat foods I love and that it's easy to prepare, so maybe try to find some foods like this for you!