Hi,
Clearly a big topic but here are some ideas that likely others may not mention.
Eat less, move more will only get you so far, if nowhere, depending on your starting point.
If you have any insulin resistance, then your body will not be able to access your stored fat for fuel.
Eating less only works to a certain extent and your body will adapt metabolically so you will burn less over time. It thinks oh, less fuel, I will reduce metabolic rate and not use enough fuel to lose weight. And your energy levels will go down.
From an eating perspective, actually NOT eating at all (i.e. fasting) will increase insulin sensitivity and enable you to access fat stores. Start slow and reduce feeding window. Breakfast later or no breakfast and eat dinner earlier if you can. Reduce snacks gradually. Don't want to keep stimulating insulin release if you are insulin resistant, it will just make it worse.
Try 24h fasts after a while.
Your metabolic rate actually INCREASES when fasting. Yes, you may not feel great but that is your hormones being all confused because it's something you haven't done before. Long story short, we wouldn't have survived as a species if your metabolic rate decreased when hungry. (We didn't evolve over 2 million plus years with 3 meals). It was feast and famine. But remember that's from a healthy starting point! Our ancestors didn't have excess fat. Can't feast until your insulin sensitivity has increased.
Do anything to manage stress because if your body is experiencing stress, fat will be preserved because it contains the most energy.
Do anything to improve sleep since poor sleep quality didn't exist when we evolved. If we weren't sleeping well its because our lives were in danger. If in danger, stress increases and we hang onto fat. See above.
A few sleep strategies that are easy to implement
1. Wear blue light blocking glasses in the evening since ANY blue light from screens, phones, TV etc tells brain to be awake because blue light is more prominent in the day (why the sky is blue!). In the evening, its amber and red frequencies (sunrise/sunset).
2. Completely dark bedroom. Use a stick on portable black out blind. There is one on Amazon called easynight black out blind. It's amazing. Any light going into the eye during sleep disrupts sleep although you won't feel it because it's how you have always slept/felt. We didn't evolve with any light except the sun. A mask can help but they can be annoying and disrupt sleep. Put an old towel at the bottom of the door.
3. Keep your feet and hands warm before bed. In order to get off to sleep, our core body temp drops. If it can't then it is much more difficult to get off. When your extremities are cold, the blood supply goes towards your core to preserve heat which you don't want before bed because you can't lose heat. It's ok to feel a little cold before bed and it's actually a good thing. Just keep extremities warm. Even if you live in a hot climate, floor tiles will be enough to stimulate the effect you don't want.
In terms of movement, don't forget that exercise is a stressor. To benefit from exercise you should work within limits of ability to recover successfully and increase the stress gradually. Going too hard too fast will create too much stress and you will likely give up.
Focus on the habit more than what you are doing. There are infinite ways to move more and if you really want a life long change, focus on daily small incremental commitments. If that means 5 minutes everyday for a month then great. Because that is likely to mean you are successful for longer. Aiming for 5 minutes minimum is good because it makes starting easier and you would likely do more anyway!
Try to stay relaxed when exercising. Use breathing as a gauge. If you need to mouth breathe, you have done too much. We shouldn't be mouth breathing ever. Mouth breathing would only have been used as a way to take in more oxygen to get away from a predator. Mouth breathing over time actually lowers the amount of oxygen that reaches our cells. Nose breathe while exercising in the beginning.
All the best