Put earning from each of your businesses on sperate Schedule C and follow the simple directions for trasferring the resulting bottom lines to your 1040. No, you cannot just enter self-emplyment income on the Form 1040, as that would avoid paying the SE taxes that you will owe.
For an easy solution, just buy TurboTax and follow the interview that it provides. It will insert you answers to the questions into the correct line and forms.
Based in MD, near DC
Shopping from the Carolinas to New York
Have video cam; will travel
Poor customer service? Don't get mad; get video.