Local leves are free, but the low level ones don't give that great EXP bonus.

You can also just straight up grind it out, but that'll cost you.

Check the recipe lists on one of the sites:

http://www.ffxiv-db.com/

http://ffxiv.yg.com/

http://mooglebox.com

Find something a few levels higher than your current level, then keep making it. To save space, try to make something that stacks, like gear parts. Try to find a nice balance between difficulty and cost.

If you do leves, just get a bunch of leves from the counter, do them, drop them off, then go back and get more. To save time, you might want to just get the leves that have pickup/dropoff in town.