Everyone's offered very sound advice. If you want to avoid crafting to earn steady gil and don't mind putting in some time, gathering materials for the crafters to use is a good shot. Things that are used a lot (such as alumen, silver ore, or if you'd like to farm stuff with a combat class, skins/fleece) are a sure bet.
Spiritbonding is also a good alternative, however there is a lot of RNG involved (the best money makers are grade IV's, and getting them is not guaranteed). Whatever you do, just know that you will have to put some time and effort into it. Dedicated a set amount of time a day to whatever you want to do to earn money will eventually pay off.
I would really, -really- recommend that you invest in at least one crafting glass, if only to do the Ixal dailies.