Just for a different taste when I get low on any tea I have I toss the almost empty tea into a tea tin marked "Mixed Tea". I do this with my black, green and white teas, and each tin marked "Black Mixed Tea", "Green Mixed Tea" and "White Mixed Tea" appropriately.
I love my black teas, and I'm drinking more and more white teas all of the time. So just now I made two pots of tea, one from the "Black Mixed Tea" and the other from the "White Mixed Tea", then I combined the two finished teas into one pot to make a mixture of black and white tea. What a new taste experience! I'm enjoying the combination of the well know taste of black tea with the settle and almost nutty taste of the white tea in one cup!