7. Put all agreements in writing. The laws of your state require you to put some contracts and agreements in writing:

• Contracts that will last longer than a year.
• Contracts that involve the sale of goods worth $500 or more.
• Contracts that transfer the ownership of copyrights or real estate.

Even if not legally required, it's wise to put almost everything in writing, because oral agreements can be difficult or impossible to prove. This includes leases or rental agreements, storage agreements, contracts for services (such as consulting or electrical work), purchase orders or contracts for goods worth more than a couple hundred dollars, offer letters of employment, and employment policies. Get in the habit of getting and giving receipts for all goods, services, and deposits, regardless of how much.

8. Hire and keep good people. Your goal should be to hire and retain truly excellent employees -- not just reasonably competent ones. A highly competent and truly enthusiastic employee is at least two and sometimes even three times as valuable as a person of average skills.

To create a stable and happy workforce, it's essential not only that your employees (and independent contractors) believe they are being fairly treated, but that your business is worthy of respect. Employees and contractors who like their work will represent you well on and off the job. And customers will more likely be loyal to an upbeat business -- and are more likely to recommend it to their friends.

9. Pay attention to the legal status of your workers. When you hire workers as independent contractors, make sure they shouldn't really be taxed as employees. The IRS can impose substantial penalties against you for not withholding taxes and paying taxes for a worker who is really an employee. The IRS and other agencies are likely to think that a worker is an employee rather than an independent contractor under any of these conditions:

• The worker works full-time or nearly full-time for you.
• The worker doesn't work for anyone else.
• The worker provides services that are an integral part of your operations.
• You control how the worker does the job and provide detailed instructions and training for the worker.

One way to help avoid trouble is to have the worker sign a written service contract, or independent contractor agreement.

Most employees you hire will be "at-will" employees -- subject to being fired at any time and for any reason (except for illegal motives such as discrimination). It's important to preserve your at-will rights because they protect you from having to prove that you have a valid business-related reason to terminate an employee. Don't make any promises to prospective or current employees that you are offering a permanent job or that they will lose their job only if they perform poorly, because this will limit your ability to terminate the employee for other reasons, such as personality conflicts or finances.

When hiring an at-will employee, have the employee sign an offer letter that makes it clear that the employment relationship is at will. Except for high-level executives, you shouldn't have employees sign an employment contract -- this can limit your ability to alter the terms of employment as your business needs change and subjects you to higher legal standards.

10. Pay your bills early and your taxes on time. In the real world, where a reputation for keeping one's word is a hugely important asset, a good strategy is either to pay your bills up front or pay them early. You gain trust, build a positive credit profile, and have a built-in safety net if things go badly. These benefits outweigh any interest you might earn by holding onto your money until the last possible minute.

Most importantly, pay your payroll taxes on time, especially the portion that you withhold from your employees' paychecks. The IRS and state tax authorities can hold you personally liable for these taxes, plus stiff penalties, if they're not paid. This is true even if you operate your business as a corporation or LLC or if your business goes bankrupt -- you will still be personally and legally on the hook to pay back payroll taxes.