It's possible you are destroying your diet without even knowing it. Take a look at the 7 common mistakes we constantly make while dieting.
Don't skip breakfast, your body needs fuel to start the day. Skipping meals could lead to unhealthy eating later on in the day.
The cyclical loss and gain of weight can do major damage to your metabolism.
This is very important. Not only does drinking two liters of water per day increase your metabolism, it also is good for your skin and can keep you from becoming fatigued.
Try and eliminate hot caffeinated drinks and replace with green tea or matcha which are known to speed up your metabolism.
A good night's sleep is very important. Bad sleep can lead to unhealthy cravings during the day.
Spend more time on your feet, if possible get a standing desk at work, so your not sitting down all day.
Switch up your exercise routine, it will challenge your body in different ways, and keep burning more calories. The same routine will result in less calorie burn over time.