I like sausage and bacon, but can't eat them that often.

I don't tend to stick to traditional breakfast meats.

I like leftover steak, chicken, pot roast, hamburger, etc. Shredded or cubed, reheated, reseasoned, and thrown in an omelet or skillet scramble, topped with cheese and/or veggies, avocados, sour cream or tomatoes and parmesan.

Breakfast (or 1st meal of day) can be inventive and fun on keto.

Sausage shouldn't be very high carb. More processing means more carbs... sausages obviously have some spices / seasonings, but definitely avoid anything with a whole lot of carbs in it. You don't want to buy anything mixed with maple syrup, brown sugar, and/or if some kind of grain is used as a binding agent. A lot of the sausage I get is seasoned with peppers of some sort or sage. It might have 1g carbs for 2 oz., if any carbs at all. So it is fine. Even if I have 8 oz. of sausage and 4 large eggs (0.6g carbs each), that meal is only 6.4g of carbs. It's a bit on the high side for me for a single meal, but still acceptable and not enough to prevent ketosis.