Check With Your Hotel
Many of the larger hotels and resorts offer babysitting services for a standard hourly rate. If not, they can refer you to a company that provides this service.
Call a Nanny Agency
There are several companies that can provide a trustworthy babysitter with little advance notice. All of their sitters have been trained, and have had background checks.
Phone: 305-607-1170 or 1-877-A-NANNY-4U
Web Site: http://www.nannypoppinz.com
Web Site: http://www.nursecore.net
The Babysitting Company
Web Site: http://www.thebabysittingcompany.com
Browse Babysitters Listed on a Matching Service
If you are willing to do some leg-work, you can find less expensive sitters by browsing listings of local babysitters. Most matching service sites require a paid subscription to search.
Listing Services that Require a Paid Subscription:
FREE Listing Services
Miami Craigslist - Childcare