How do you start photography business?

Master Photography and post-processing to a professional standard. Develop a professional level of expertise with studio and natural lighting, posing individuals and groups, composition, etc. Learn to see light and read the lighting in other people's photos.

If you're planning to shoot weddings or other events, apprentice with an experienced wedding/event photographer as a second shooter.

Develop a portfolio. Have it critiqued by established professional photographers. Heed their advice. Be your own harshest critic.

Make sure you have at least one back-up body and lens. Ask yourself what you would do if any given piece of equipment died without warning in the middle of a job.

From there it is the same as starting any other small business. Contact your local Small Business Development Center for help -- this is a free service sponsored by the Small Business Administration. Take advantage of it! Your local public library should also be able to provide many resources for starting your own business.

Draft a business plan. Research your competition. Develop advertising materials and a marketing strategy. Create a budget. Work on your people and sales skills. Read every book about photography and running a business you can get your hands on.

Get a business license for your state, county, and/or municipality. Get an EIN from the IRS. If your state has sales tax, get a tax ID and file the appropriate paperwork. Open a bank account in the name of your business. Keep your business finances separate from your personal finances. Document everything.

Consult with a lawyer to draft contracts and other business documents. Consider forming an LLC or S-Corporation. Consult with an accountant to set up your books and make sure you comply with all the tax laws and take all the deductions you are entitled to.

Get professional liability insurance. Many venues will not let you shoot there unless you provide proof of insurance. Insuring your key equipment against theft and accidental damage is a very good idea - most homeowners/renters policies will not cover professional tools and have very low limits on photography equipment.

Keep reading, learning, and improving your skills. Network like crazy.

Photography is an extremely competitive field. If you intend to survive, you need to have competent technical/artistic ability as well as Excellent people and sales skills.