The four steps of a standard rummy round, in order

Round flow is the simplest frame for what comes next. The four steps below are the same for points, pool and deals rummy. What changes between formats is the round count, the score pressure and the table stakes.
Drawing happens automatically. Sorting is a habit. Melding is the strategic part. Declaring is the final commitment, and it should be the only commitment in a hand that cannot be taken back.
Three mistakes the desk sees every week
Holding a joker too long
Jokers are powerful because they can substitute for any card. They are also limited in number. A joker held in the hope of a perfect set is a joker that is not helping a pure sequence.
Skipping the sort
A bad sort makes every later decision slower. Sorting is a thirty-second habit that pays back in every pick-and-discard decision that follows.
Declaring on a wrong show
Wrong show is the most expensive mistake a new reader makes. The desk recommends dropping a doubtful hand rather than declaring it.