Figure out the project you really want to work on, and concentrate on THAT. Even if you stick to just that project, you'll somehow find yourself spending much more on money on many more animals than you intended. But it'll help.

And budget how much you're willing to spend this year, and next year, and the next year. Make a plan. Stick to it. No impulse purchases, particularly if they're not on the plan. (Unless you have enough money to set aside an Impulse Purchase Savings Account)