I use the fruit purees that come in the can because they are super convenient and work great. Depends on the fruit, but I generally take a bit out to use for fruit syrup for pancakes. Sometimes the whole can is too much. And I don't wait until secondary to do it. Once primary foam drops, it goes in and then the foam starts back up. Once that foam falls and the bubbling in the lock slows it goes to secondary. Works much better than doing it in secondary and you get a lot less sediment and more beer because of that! My Apricot Honey Ale is awesome! And the fact that it goes in after primary has crashed means that the fruit flavor does not disappear at all.
I don't use pectic enzyme.