The same way the majority of non-Japan-based anime fans do.
Anyway, I'm in the middle of the theatrical Macross Frontier False Songstress (Itsuwari no Utahime). It basically retells the first-half of the TV series, but so far it's got differences.
The most intriguing one so far, and this doesn't spoil anything major, is how Sheryl knows the song Aimo, because in the series when Ranka first sings to Alto, she sings a song written by Sheryl, and Sheryl makes a surprise appearance by joining in. Here, she does the same, but the unusual part is how Sheryl questions how Ranka knows of the song, whereas Ranka does the exact same after she leaves. In the series, only Ranka knows this mysterious song.