Another mindful eater here. I normally maintain a healthy weight and am currently losing my second round of baby weight. 1+ stone down since May, and half a stone to go.
Be patient. It's easier to gently lose 1lb a week than yo yo with greater amounts. Life does get in the way.
Exercise. It feels good, tones you, and boosts your metabolism for extra calorie burn. I've had to rebuild fitness from scratch and am using walking and aquafit to get me to a stage of being able to increase the impact.
Avoid low fat. It's packed with sugar, sweetners and other fillers. Cut sugar. Sugar crashes make you hungry and tired. Healthier fats keep you filled for longer. Sweetners con your body into sugar rushes and crashes and mess with your metabolism. Protein is good for snacking.
Portion control. Smaller plates. You can leave food on your plate. It's more wasted in you.
Don't ban anything, but be moderate. Consider if you really want or need it. Go for quality over quantity.
Think about what you drink. Soft/ alcoholic drinks contain a lot of sugars/ sweetners. Dilute juice so the sugar content goes down. My pub drink is now lime and soda with far less sweetners and sugar than lemonades.
Subsitiute. When DH has a cake when out, I'll have something smaller and more modest. I'm not missing out, but can still save a couple of hundred calories.
Avoid certain sections of the supermarket, and don't let the rubbish into your house. If you really want it, you'll go and get it as you need it.
Home made contains less rubbish than premade. Batch cooking is good for "ready meals"
Keep a spreadsheet to record your progress. If I have a poor week I can still see the general trend. I record waist/ hip measurements and log exercise too. Seeing the exercise filled in most days is very motivating.
My methods work for me because they're sustainable and I'm not deprived. It's realistic for me and simple to maintain through life. There's no fail.