I don’t know about you but I have so many different income streams from my IM activities that it can be difficult to keep track of the incomings and outgoings. Even if you’re only treating your internet marketing as a hobby you should still be declaring your income, which means you need to keep track of your accounts. An Excel spreadsheet might sound like a great idea to begin with but unless you’re au fait with double entry book keeping you might have trouble getting your numbers to add up!