One simple issue can have many sources or combinations of sources as its root. It could be as simple as too many appliances or devices plugged into your outlets. Or it could also be that a breaker in your panel has exceeded it’s life expectancy. There are other possibilities such as faulty GFCI or AFCIs or even rodents that have eaten away the insulation of the wires in the wall which allows two wires that were separated by insulation to now make contact with each other and cause a breaker to trip. Due to the possibilities, it is best to call a licensed electrician or an electrical contractor in Las Vegas or Southern Nevada to have a proper diagnosis of your problem.