I am a cadet in the Air Training Corps (Air Cadets) and currently doing training for the nijmegen march, although I can't do it this year as I'm not yet 16.
So far the training weekends I've done have gone really well, and I've definately been helped along by the singing (good and bad). I especially like 'Way, hey rock and roll' - that's best in the early morning down by the sea front when it's raining.
I've sung a lot of the songs mentioned here, but some with slightly different versions. Does anyone know any different lyrics to the song with the chorus "Glory, glory what a hell of a way to die"? I heard a couple of people singing a really good version with not so many repeats and I really want to learn it.
Here's another song that has a good tune:

(Verses to be repeated after each line)

When my grandaddy
Was one hundred and one
He did the Nijmegen marches
Just for fun

Chorus (to be sung after each verse):
He sang 'your left, your left'
(others) Your left, your left
Your left, right, left
(others) Your left, right, left
He sang 'your left, your left'
(others) Your left, your left
Your nijmegen left
(others) Your nijmegen left

When my grandaddy
Was one hundred and two
He did the Nijmegen marches
Just like me and you

Chorus

Verses are repeated with the following:

One hundred and three - He did the Nijmegen marches/ Between his lunch and his tea
One hundred and four - He said I can't slow down now/ For you boys no more
One hundred and five - Well he taught me the two-step/ For the Nijmegen jive
One hundred and six - He said well come on boys/ This ones for forty clicks
One hundred and seven - Well the poor man died/ And he went to heaven
One hundred and eight - With his head held high/ Walked through those pearly gates
One hundred and nine - Well he had all them angels/ All marching in time
One hundred and ten - He said let me back down/ I want to do that again

Thanks to Edmund for all his suggestions and tips on doing the actual Nijmegen. You should get webbing - it's so much better than wearing a rucksack.