I’ve finally had my eureka moment. But I have a question

I’ve had my guitar for a long time but I hardly play it because I get unmotivated because I’m not improving fast enough. But thankfully thanks to some thinking, I’ve finally realized that for one, I can’t rely on motivation to play. I need to rely on discipline. And for two, I haven’t been really practicing, I’ve just been playing what I know because it sounds decent. My question is how else besides practicing scales can I effectively practice? Thanks for any answers