Personally, although a lot of people go the route of the LLC or sole proprietorship, I prefer the S corporation. You separate the
liability, you can open a bank account in the name of the corporation and buy everything with the corporations credit cards or debit VISA, so you don't have to worry about receipts, and if you lose money (God forbid) you can flow the write-off through to your personal expenses. You can find all kinds of small cottage industry incorporations services on the internet. Just Google "incorporate in Indiana" and you'll have more results than you'll know what to do with. Did I just end a sentence with a preposition?