the past while i have just been messing around when i juggle, and i havent recognized any major signs of progression. so i have started changing up how i practice and its been working out well.
1. i start out with a goal. the goal could be to qualify 6 clubs, find as many 3 club under the leg combinations as i can or just to have fun. if i have multiple goals then i set a time frame for each of them (like 6 clubs 20 minutes, and 3 club patterns one hour) and put them in order of importance. if one goal doesnt work that day then i move on to the next goal and save the other one for another practice.
2. i write down everything that happened in my juggling notebook. this way i can remember patterns that i like and also see what went wrong. sometimes while im writing it down i also come up with another variation and its easier to visualize patterns i want to learn.
this may or may not work for you! but its been helping me so far.