A good rhythm
A good rhythm is a short session most days. Open one game. Sit with it. Stop.
Most days is a habit you keep, not a product. DIGIGMA has no set of puzzles for the date, and no mark for a run of days. You come back because you want another board.
If a day is full, skip it. The unfinished puzzle will wait under Continue on Home. Nothing expires.
Four live games are enough variety for that rhythm: Sudoku, Star Battle, Binary Puzzle, and Killer Sudoku. One of them, most days, is plenty.