One thing you could always practice is doing the basic juggles consistently. For very low launches PPP or PP2KK, a bit higher PP6PK or 8PK6PK, for higher PP4PPP or 4KPPPP, for higher 7PK, P+KPPP or 7PK, 7PKKK, for higher 7PK, PP6PK, for higher 7PK, PP4PPP. The most important ones are PP6PK and...