Consider also setting up a savings account that your checking account is linked to: you can automatically set aside money each month (taxes? planning for a conference?) and it serves as an overdraft protection. Also, a business credit card can be a great way to both track your spending and earn cash back or miles!
Use a program like Xero, Quickbooks, or Mint to track your expenditures and label them. This will save you SO much time later on. Promise. ** Note: These are NOT HIPAA compliant so you cannot use them to track your client payments. Quickbooks desktop CAN be used for that. If you use an EHR system you can track your client payments on EHR (do invoicing there) and your expenses on your accounting software.