Re: snacking, I second the advice of finding something that you like that you can eat as much of as you like and make it the easiest thing to eat. For me, this is celery, carrots, and some hummus for dipping. I don’t have much of a sweet tooth so grapes are enough to satisfy me.
A bad habit for me has been time on my phone. I’ve started leaving my phone in a relatively inconvenient place in the house. This has helped immensely. All those little 5-10 minute breaks to check a few apps add up to so much time so fast. I’m literally saving more than an hour a day, which is sad to admit.