I recommend getting kiwis, honey liquor's, vinegar, water, nectar, ambrosia, smoked black teas, lavender oil (or something like that). Peppers and pineapples are multipliers, which help a lot. Sometimes you need to skip customers and do other ones. Don't skip too much or else it might make you have to get more stars to satisfy the customer.(Hopefully you haven't fully given up on the game or finished it already.)