How can I add metadata to mp3s, along a timeline to break up one mp3 in subsections?

How can I add metadata to mp3s, along a timeline to break up one mp3 in subsections?

I would like to add metadata to mixtapes or lectures that will show song names as the mix progress as well as being able to skip forward in the mp3 as if it was separate files. I have seen this done in long recordings and it's really useful to be able to get the additional information as well as avoiding fast forwarding.