Part-time assistant jobs are booming, and part-time hourly rates are among the highest.

But the job opportunities are often scarce.

The average hourly wage for a virtual assistants job in 2016 was $40.51, according to a study from consulting firm McKinsey & Co. The company also found that most virtual assistants have fewer than 40 hours of work experience.

To be sure, there are still plenty of jobs available that require a lot of time and training.

Here are some tips to help you find the best part-timers and hourly assistants to work for you.