Go during the slow season: July, August, and mid-December are best.
Don't buy alcohol — it's free.
Though road-tripping is arguably the cheapest way to get to Vegas (from the West Coast), flying is not as expensive as you might think. Look for deals on local airlines.
You can also take a bus. From L.A., round-trip prices are in the $50–$95 range.
And check Smarter Vegas for special promo codes before you make your final decision.
Don't rule out staying in a suite! If you split it with friends, it can actually be relatively affordable.
If want to see a show, stop by the Tix4Tonight booth to get major discounts.
Avoid cabs if you can. Save some money by riding public transportation.
Hit up a brunch buffet. They're much cheaper than dinner buffets and typically include some kind of alcoholic beverage.
And finally, if you're gambling, bring out only what you want to spend for the day.