There are some great responses here. I agree with all of them. Port is wonderful with figs, sake with dried cherries and cranberries, Reisling for stone fruits, etc, but it's important that you keep in mind what the other flavors in the recipe are so everything is balanced. Also, you can temper the strength of any of these alcoholic beverages with simple syrup, so the rum, for instance, doesn't overpower everything else in the dish. Tea, coffee, wonderfully flavored vinegars, stock...all of these can be used depending on what you are making and whether it is sweet or savory.