Just put your nose to the grindstone and farm.
Step one is to upgrade your offense. Level four archers and giants, level three wbs, and level one healers will be hard to farm with. Your army camps also need to be upgraded. I don't encourage gemming, but if you were going to gem I'd get archers, barbs, and minions to level five ASAP and start running BAM. Alex the Great has posted extensively about it on these forums.
Not sure if I'm counting correctly but I think I'm also seeing only four workers as well as some of your workers sleeping. I would encourage you to buy the fifth worker and get them all working ASAP. Wizard towers are extremely underleveled. Make those your priority.
e: Alex's YouTube channel showing BAM in action:
http://m.youtube.com/#/playlist?list...58I-mWmqzKFpP0