How to made gills?

[MomomiMomi]

Other than the standard ways of whatever it is you did to get your money in the first place, the best time to make gil is at the start of a new patch.

[Neophyte]

Either wait for a new patch (and be prepared with a varity of now-cheap-then-expensive mats.. but that's a bit of luck included).

Level desynth, to get cheap 'high' value mats out of dungeons drops (and in terms of battle demi 3, save them for niddhog/sephi/sophia weapon release).

Search for niches on market and sell lvl 10-50 hq gear for 10-50k.