One of the big changes for me is that I am eating a lot of green salad these days. I don't mind that - I like salad. But it can be boring if it is always the same. Plus it can be a source of a lot of carbs if you aren't careful - be sure to read the label if you use a commercial dressing. The vast majority contain sugar.
But why on earth would you use a commercial dressing? You can do better. Much better.
The easiest is the basic vinaigrette. Three parts olive oil to one part acid (lemon juice or vinegar (not balsamic)), mix and season to taste with salt and pepper. There are several permutations just with that, but add some minced fresh herbs for more variety. Add some mustard and/or an egg yolk to make a creamy emulsion (start the emulsion with the oil and add the acid - just like making mayonnaise). Finely minced shallots are great too. Garlic. Parmesan cheese. Red pepper flakes. Seasoned salts. Anchovies.
The best blue cheese dressing in the world is the simplest. Take some Kate's Real Buttermilk, some blue cheese (Roquefort or Stilton) and a fork and go to town. Use a food processor for large batches. Season with some salt and pepper. Make it nice and thick. This is very yummy, I promise.
Or get creamy. Flavor some creme fraiche with something tasty. Like maybe 1:1 with some nice no sugar added salsa. Or a roasted red pepper puree. Make the creme fraiche yourself (just like yogurt, but use heavy cream). Make the red pepper puree yourself (take some red peppers, throw them on the grill until they are black, cool, peel, seed, puree, and season). Herbs would be good here too. Creamy basil red pepper dressing - yum.
Don't forget that bacon bits are low carb. So are sunflower seeds. And pumpkin seeds. And slivered almonds.
Don't let your salads be boring.