The next time you take a trip to Las Vegas, think twice before you commit to a rental car or a taxi cab. Depending upon the purpose of your trip, a rental car may be unnecessary, and just a waste of money. There are cheaper modes of transportation in Las Vegas, if you know where to find them. For example, the city bus will take you directly from the airport to certain points around the city, some of which are right by major casinos. And some of the casinos offer free shuttles to other casinos as well. These routes are not advertised, so you have to know how to find them. Check my Ehow article on the topic:

How to get cheap transportation in Las Vegas