Make a time selection of each section. If a section is a single item, just CTRL+double click it, otherwise manually make the selection.
SHIFT+R to "Create region from selection", then right-click > edit the region and name it accordingly to the song name you want. Rinse and repeat for each section/song you want exported.
Go into the Render dialog and choose...
When you click Render, you will get one stereo file for each region you created with each exported file having the name you gave that region.