Honestly, just mix stuff you like. I mix peanuts, almonds, cashews, and cranberries. I like mine about 1/3 fruit to 2/3 nuts. Sometimes I salt it with kosher salt and potassium salt, sometimes I don't. Depends on what I want.
Sometimes I add a touch of honey or sugar.
Sometimes I add some cayenne and paprika.
Just play around with combinations.