How Can I Add More Inputs To My Stereo?

In a world full of personal devices, it is easy to run out of auxiliary inputs on an old school stereo.  Most old school stereos were designed for inputs from a record player, a tape deck or two, and a CD player.  When you want to add a cellphone, a tablet, a computer, and an MP3 player, you can run into problems.
How do you add new devices to a stereo?

The answer is simple: an audio source selector switch box.   I picked a Radio Shack switch box up at a thrift store for just a few dollars and now I can plug in nearly any device wthout running out of audio inputs.  If you'd like to save yourself months of searching your local thrifts, simply check one of these out: