Information about rebates for energy efficiencies, appliances and electronics can be found on the Nevada Governor's Office of Energy site, Office of Energy, and the Governor's Office Press Releases.
Appliance and electronic special offers, rebates and recycling incentives are detailed at ENERGY STAR. Federal tax credits are listed there, as well.
Check with your local water provider for xeriscaping rebates.
Local/city and federal incentives may be found at the Database of State Incentives for Renewables & Efficiency.