Any money making tips between 20-30?

I’m currently a lvl 24 Night Elf Druid. My professions are Leatherworking and Skinning, and I do cooking and First Aid when I can. Lately i’ve been just questing in Ashenvale/Stonetalon and I accumulated up to 3 gold, but most of that burns away from getting my druid spells every other level up. What would be a good way for me to get more money so I can get my new spells and mount at 30? Should I be auctioning my leather off instead of trying to get my LW up? Maybe pick up another gathering profession?