You have to be grateful for suffering. Now you can't practice being grateful for a toothache. It's better to practice being grateful while eating ice cream or chocolate cake. That's when it's time to flex your gratitude muscles.
First of all make a very big bracha. And while you're enjoying it, think of all the components. Think of the sugar and the chocolate and the other flavors, the coloring... think of all the delectable ingredients that go in to make this such a luscious experience and while you're enjoying it, what Hakadosh Baruch Hu is doing for you. So that's an exercise in gratitide which is much easier. -- Torah of Suffering (#39)