Number Three: The day when I learnt it's not pain, it's 'discomfort'.
My first time crossing the 20 mile barrier was a painful, sorry, uncomfortable one. It was a hot day at the end of August and once again I was planning to walk along Regent's Canal.
I'd already had problems with Regent's Canal when my legs starting hurting on that particular stretch during a training walk in July. And it reared up as my enemy again in September and then once more in March (I avoid the whole area now), but it was during August that I learnt to just keep going. I imagine that this spirit will probably make the difference between success and failure on Sunday/Monday, so I'm glad I learnt it early.
I'm not posting a picture of Regent's Canal, because I hate it.
Have a picture of a cat on a boat on the River Lee instead.