Yep, I write off the internet and phone usage for the business. I also write off advertising, 50% of business meals, and things like that. I think you can write off animal shipments to your farm too, or at least you could with sheep.
I'm like almost everyone else here, I hire someone else to do the taxes, mostly because they'll have my back in case of an audit. However, I do pay attention to what is going on and I keep my receipts and detailed records.