This is what i would do. When you are between getting your cab...I would first start by making business cards. You can make them real easy on your computer for next to nothing (doesn't have to be fancy) I would print off some maps of the main touristy areas.I would staple a card to the map.
When you are driving the cab I would give each passenger a map with the card. I would be very polite (your greeting is very important...don't worry about sounding geeky....people love politness...Hello Mis ....sir...you know) If they are quiet ...you be quiet..If they seem chatty....chat back...but stop if they do...follow their lead(You get where you can read people) When you stop to let them off...tell them " "have a good evening, day" whatever.. and say" when you need a ride again just ask for me" ...the name is on the card.
You will get where you know las vegas like the back of your hand(about one year) You will be able tell people the best places to eat...hotels...entertainment on and on...You will eventually build your cliental by giving out the cards and MOST important...being POLITE...an almost lost art.
Trust me I did this for three years and I'm so glad I got through the first 6 months...because after that ...it just gets easier and easier and the tips get bigger and bigger.
E-mail me if you want...I could tell you some of the stupidest things I did and for about the first 4 months how everyday i just wanted to quit.