Showing gratitude for the good things you have is the most powerful happiness boosting activity there is.
Every night before you go to bed write down three things good that happened to you that day. That's pretty much all it takes to get a happiness boost over time.
Do fewer things and do them well. Focus on the things only you can do. Do the important things which must be done now.
We all only have 1440 minutes a day. Accept you can't do it all, focus on what's important and do that well.
The first step is crucial - keep it tiny. Do not be ambitious yet. That leads to failure. Consistency is what you’re shooting for here so make the hurdle as low as possible.