Being prepared when inspiration hits.
Scenario # 1. You are strumming your acoustic guitar, freshly polished, new strings and perfectly tuned. The sound is bright and crisp. You are playing a few chords that you have learnt from Guitar Alliance when bam! A brilliant chord progression hits you like a bolt of lightning.
You rush to find a pen and paper and grab a pen that hasn’t been used since your primary school days. You etch down your chord progression on an old scrap of newspaper dated January 7th 1994 that you found under a pile of magazines, yellowing from age. By the time you finally get the pen working you have forgotten the chord progression and have managed to get blue ink all over your hands and freshly polished guitar.