Estimated tax payments. Most people who start working for themselves after many years of being a W-2 employee often overlook the fact that they are not paying taxes during the year while they are earning income. I always caution the new entreprenuer that by overlooking this simple function they can have a huge, hegative, fianncial impact on their business. By reminding them about estimated taxes, and helping them caclualte the correct amount, they can get started on a more sound financial footing and eliminate a major "surprise" when tax time rolls around.