With WP 8.1 bringing custom notifications per app in the action center; users will probably want to add their own custom alert tones, as those provided by Microsoft and Nokia pretty much suck. Below is a quick video guide showing how to add custom alerts to your WP device (all you need is a computer and a USB cable).
Once you’ve figured out exactly how to add new tones o your WP device, the more difficult part is actually finding a decent notification tone; especially if your phone never shuts up. To hep you out I’ve uploaded a file with some of my favorite simple short, non-obtrusive alerts (in MP3 format) at the link below, enjoy them!
P.S. have a favorite alert tone? Tell us what it is!