Not just cut services - cut entire agencies! Start with the so-called "Department of Education" That will save $68.6 billion each year.
Then cut “Health and Human Servicies” along with all its programs (from Wikipedia):
The Department of Health and Human Services’ budget includes more than 300 programs, covering a wide spectrum of activities. Some highlights include:
Health and social science research
Preventing disease, including immunization services
Assuring food and drug safety
Medicare (health insurance for elderly and disabled Americans) and Medicaid (health insurance for low-income people)
Health information technology
Financial assistance and services for low-income families
Improving maternal and infant health, including a Nurse Home Visitation to support first-time mothers.
Head Start (pre-school education and services)
Faith-based and community initiatives
Preventing child abuse and domestic violence
Substance abuse treatment and prevention
Services for older Americans, including home-delivered meals
Comprehensive health services for Native Americans
Medical preparedness for emergencies, including potential terrorism.
Health care reform