For every band situation, I use a spreadsheet to organize my mental notes, chord changes, patch numbers, tricky spots, etc. for each each song. Then I convert the spreadsheet to a PDF and load it into an iPad Mini that rests on the panel of my lower keyboard.
By default, I sort the spreadsheet alphabetically, which is easy to scroll through during a show. If the band provides a set list, I'll also make a second PDF with the songs sorted accordingly -- although I often end up jumping out of that PDF to the alphabetical sort when the band veers from its regularly scheduled program.