A lot of people suggest counting in some form or another.
Whether it's calories, points, or macros...
Here's the thing, if you think counting calories is something you will enjoy doing for the rest of your life, then by all means, count away.
What you do now to maintain your health and your weight it should be enjoyable and sustainable for life.
Does counting sound appealing to you? Do you think you'll be able to keep it up long term? Will it be easy to do in many different situations?
If the answer is "no", then look for another tool to help you maintain for the rest of your life.
I suggest you try two things: