Brown Sugar

Have you ever went to use your brown sugar and it is really, really hard? This is something that has happened to Angie and I...most recently when we had our granola baking experience! Do you have any tips to keep yours soft and ready to go when you need it? Please, please share with us and our readers.
I did see a few hints online and wonder if they work. One was to put the brown sugar in a container in the microwave with a bowl of water beside it. Microwave a minute and keep checking every 30 seconds after while being careful not to melt the sugar.
Another was to put a slice of bread in with the brown sugar in an airtight container to keep it soft. (I know this works with homemade cookies)