[Aperocky]

Speaking from experience, you force yourself to use it for a period of time, preferably in a time where the task load is slightly smaller than usual. After a full month and half of this, vim commands has more or less burned into my muscle memory. This did result in many useless :wqa being typed on other software but it was absolutely worth it.

[daotoad]

The next step is to pay attention and note when you are doing something that seems to take a lot of commands or just generally be inefficient. When you notice this happening, search docs and articles to see if there is a better way to do it.

Over time, you will accrue the things you need to know to use vim effectively.