Productivity

Hi, some time ago I decided to include a new productivity method every year or every time I switched to a new job. I already tried the following methods (more or less successfully):

• vertical mouse and mechanical keyboard
• GTD and Pomodoro
• leather notebook for every thing
• knowledge base and bullet journal

What do you have in mind that I could try for a whole year and see if it sticks? I'm thinking of reading a lot of books, get some training to eventually get another kind of job, etc.