Budget for your Practice?

All,

Do you run your practice on a budget? If so, how much do you put aside from each $100 gross income for the following categories?

Your Salary

Office Space

Your Medical Insurance

Your Retirement

Professional Insurance

Advertising

Equipment Repair

Equipment Purchase

Income Taxes

FICA/MEDICARE

Office Materials 

Planned Expansion

Continuing Education

Internet Fees

Telephone Fees

Support Staff

Accountant Fees

Are there major categories that I've missed? 

How do you disperse the funds among the accounts?

Thanks All, I look forward to your replies,

Walt