How much should you pay a new marketing assistant? What's the going rate for a computer consultant? Quite often, small businesses take wild guesses when it comes to setting salaries for employees and fees for consultants. Now there's no longer an excuse for not knowing the current market rates for most jobs: The Web is packed with need-to-know data. Where can you find it? JobSmart (http://jobsmart.org/tools/salary) is a terrific starting point. From this site, there are links to more than 200 salary surveys on everything from jobs in the hospitality industry through retail, transportation and administrative support. Pinpointed, localized information is provided for some California markets (Los Angeles, Sacramento, San Francisco and San Diego), but there is also plenty of data on national pay scales. Before hiring another employee, check here to see whether your offer is miserly . . . or too generous.