The best thing you can do is to let yourself be "pulled" by something. Intrinsic motivation beats any trick you can possible come up with.

Find something that's exciting for you to create. Create it using whatever tool you want to learn. Don't worry too much about whether you're building it The Right Way yet. You will be forced to learn enough to get the job done.

Then repeat N times for desired level of expertise. https://upload.wikimedia.org/wikipedia/commons/e/ea/Asymptot...