Inheriting its game mechanics from Tiny Tower, sales can be maximized in the same way within a Tiny Death Star: After building 20 or so levels, focus on re-stocking only 3-coin inventory. See the prior article for a bit more on this. Work toward evicting any Bitizen not in their dream job. On each apartment floor, try to keep one slot open for a new move-in. (Evict any new tenant if no dream-job is available.) Save Imperial Bux to upgrade the elevator.
"The only reason for time is so that everything doesn't happen at once." -Albert Einstein