[Kiro]

Eat the same thing every day and just stick to it. No deviations. You should construct a healthy meal that contains everything you need and adjust the amount so you're on a calorie deficit.

Not for everyone but has worked wonders for me. Really easy as well.

[Jtsummers]

I largely do this these days, but learn to use spices and seasonings well. Essentially no effect on calories (perhaps on salt), but wildly different meals even with the same base ingredients.

[Kiro]

Yes, good point! I do the same.