3. Don't consume what you don't need. This is the other half, the more difficult half, of releasing everything you don't use: you can't buy more crap to replace it. Only buy the food you're going to eat, and be very mindful and selective of what clothing and other products you buy. Will you actually use them? Do you even really want them, or do you want to just feel better in the moment? Trust me: A bolstered bank balance and the confidence of having a little more self-control will feel much better (and so will keeping a simple space you can actually maintain).
4. Put your self before your work life, as often as you can. Sure, there are some exceptions -- like when you have to take care of your responsibilities and forego a few more minutes of sleep for an important email -- and that's fine, as long as you're in the mindset that you are not your work. You are more than just what you do and earn.