Since I had a baby, I've not only become an expert at performing daily one-handed tasks, but i've also become pretty adept at discovering muli-uses for almost any item I pick up with that aforementioned free hand.
For instance, mascara. Before you toss out your expired tube of Great Lash, hold onto the wand. Clean it and repurpose it as...
A brow brush
To clean bathroom tiles/other hard to reach areas in your home
...or as a replacement wand for your next tube of mascara*