Citrus squeezers are so much faster and easier that I can't believe I used to live without one. I use lemon and lime juice so often for cooking (and cocktails) that it makes sense to have one, even though it doesn't fully replace my reamer, which I still keep in a cabinet somewhere in case I want to juice an orange or a grapefruit.
Oil will typically cause eggs to stick unless you use a lot of it. You can use less butter and have less sticking. 1 Tbsp butter for cooking an egg is much easier than 1 Tbsp oil. And it’s not nearly as bad, at least in this amount, as commonly thought.