Doing roulette as the needed job gives bonus gil.
You can also complete as many of the weekly Challenge Logs as you can.
Another means would be killing monsters for monster drops that sell well (and/or sending a leveled retainer to get some too. They should bring a mix of HQ and NQ, and a decently geared retainer can bring 10 in 40 minutes).
Farming dungeons for minion drops that you can sell on the Market Board is also an option.
Spiritbonding can probably still be somewhat good, to an extent, but this is out of my field of expertise, so I can't guide you, there.

Those are the few that pop to my mind. I'm sure people will tell you more though!