One of the things that I learned in the early stages of my music career is the importance of having a sound check.
In the early stages, I would turn in at the start time of the event with my instrument, put it together while I was in my seat, go on stage when my name was called, and play. This made it so I didn't normally get the sound experience I hoped. Fast forward to today, when I arrive 90 to 60 minutes before the starting time of the performance, depending on whether I’m bringing my own PA. I make sure that my sax mic is working, that my setup is correct and that my tracks work. Then, I walk around the stage in order to identify any zones where the signal of the radio mic may drop or stutter, or where feedback could be generated.
This is how I can guarantee a good sound and therefore a good experience for my audience. To illustrate, here is a little clip of me doing a sound check before playing Kingston Town at an event this summer: