This is an excellent video from Nick “Chewy” Albin. He’s talking about training plateaus in jiujitsu, but it applies just as well to judo. He’s talking to white belts, but it applies just as well to yellow belts, green belts, brown belts, even black belts, because in martial arts the learning never stops.
You never get to a place where you look around and think “Oh, hey, I’ve learned all there is know – great. Now I know judo.” It never stops. So when you get to a place in your training where you feel stymied or frustrated, whether it’s as a complete beginner or as an ikkyu brown belt, watch this video.