Op, you sound just like me. Lost 20 lbs in early 2019, maintained the rest of the year and want to drop another 15 in 2020
What worked for me:
1. counting calories, weighing, measuring everything, focusing on protein
2. weighing myself daily
3. lifting heavy
4. running a few days/week- more because i enjoy it than thinking it will help me lose weight- losing weigh is all diet
5. eating everything in moderation- I did not put one thing off limits. knowing I could have whatever i wanted if it fit my calories and even when it didn't made me think about it and want it less.
2020 plans
1. Count calories- hit calorie target at least 80% of the time- no more than 1 day/week of not hitting calorie target
2. Continue lifting 3x/week and running 3x/week. focus on getting stronger.