For productivity, you have to come up with a system that you can actually stick to, that works for you.
Take what is useful and leave the rest.
Don't feel like you need to try everything right now. These are just optional tools, vetted by me, that may be useful to you.
Trying to get a handle on what types of tools would work best for you?
This free Productivity Style Assessment by Carson Tate can help describe your preferred workflows and help narrow down which of the following tools you'd like to try: