When that happens the chances of taking action decreases.
Sometimes something sounds too simple, in order to allow ourselves to procrastinate and a reason not to take action we try and make it more complicated than it actually is.
To lose weight, a lot of it comes down to your nutrition habits, as much of the time as is possible you must strive to eat as healthy as you can. To know which foods you can eat a lot of regularly and the foods you have to have as occasionally as possible.
To get the balance right, to never have too bigger portion that leaves you feeling full.
To move a bit more, be more active this is what your body was designed to do.
To keep repeating the above into some kind of lifestyle that takes you to were you want to go and to maintain it as best you can, simple.