How can I be more productive?

The best way to be productive is to starting "doing" rather than "thinking"
* Set small goals
* Reward yourself for completing those small goals, small rewards like taking a break, eating your favourite snack, spending time with your kid.
* Do not multi-task because we really can not.
* Create a list of things to do and strike it off one by one. Do not get overwhelmed by the list. 
* If you can delegate something do that, but make sure to follow up.
* Actually there is a course by David Allen on LinkedIn Learning or you can also read his book "Getting Things Done" it tells you about a 5 step process. Capture , Clarify, Organize, Review, Engage. 
* And anything that can be done in 2 minutes, just finish it off. 

Starting with one small thing, will make you productive. It is like a dominos, you change one keystone habit and it changes all the others eventually.