Just discovered a new aide-memoire for the New Testament letters – God’s Electric Power Company (Galations, Ephesians, Philippians and Colossians.) Not bad, but it doesn’t beat my method:

So, there’s the Gospels (Matthew, Mark, Luke and John – just have to remember that), then Joan of ARC (Acts, Romans and Corinthians (1 and 2)), then AEIOU (GAlations, Ephesians, PhIlippians, COlossians, and ThUssalonians). Ok, so that last one’s a cheat! 🙂

After that it’s tricky – but it sort of rhymes:
Timothy Titus phi-le-mon
Hebrews James Peter John

Jude is another one you just have to remember, and then Revelation is easy ‘cos it’s last.