I'm a software developer who recently started to work 4 days a week and consequentially I have some free time I want to dedicate to self improvement. I'm not looking to learn new programming languages or framework, but I just want to learn or improve code agnostic skills to do my work more efficiently.My first idea is to improve the way and how much I use the keyboard with the final goal of typing faster and use the mouse less (my wrist will be happy about that).Is there any other everyday skill you think is important to master? Any advice on how to improve it?