My contender for BEST song in the entire show:

BEACH COMBER by Real Estate (https://open.spotify.com/track/3tPh7vkXySn2lUEH1NEPyO?si=c56e64ef51dd4ae6)

Why? it encapsulates EVERYTHING about the show and being a fan of the show years later. The nostalgia, teh happiness, the joy, the high jinks.

Especially considering the context in which it's used in the show. Ted coming to a life changing realization and chasing down his dream...

Is that not THE BEST description of the ENTIRE show?

PS: I'm about to start my rewatch, so that playlist of all the songs in teh show is coming :)