I'm one who likes to add up frequent small meals so I never have to count past 200. I eat 200 calories for breakfast, 200 for snack, 200 for lunch, etc. (Or 300, 400, whatever). I like to keep it simple.
As for your method of tips for cutting calories? I have many.
1. Ditch the mayo. Learn to use mustard or ketchup. I like a brand that doesn't have HFCS.
2. Ditch the top bun. I like to cut my bottom bun in half and use the two halves as top and bottom. I'll even use half a hot dog bun with a full hot dog.
3. Serve yourself a normal portion, then put half back.
4. Be choosey. At any given meal is there one item you eat out of habit or because it's there? I used to eat hushpuppies because they came with my meal. I didn't hate them...but I certainly didn't love them or really even like them. I stopped eating stuff like that.
5. Rather than focusing on cutting out foods, focus on ADDING foods. This is more proactive. Eat more vegetables throughout your day. They're incredibly low calorie and can fill you up so you don't want the other crap.
6. Learn to love FiberOne cereal.

It's filling and I now eat it like popcorn whenever I crave something to munch.
7. Bake and roast whenever possible.
8. Go light on pasta. Pasta is highly caloric.