Every incident is memorable. Every monthly meeting is memorable. As a writer, it's important to find the time to write with no outside distractions. I am usually reeling with too much stimulation. I don't know how I get it all done, and no one else does, either.
Rejection is the greatest challenge any writer has to face.
Lots and lots of rejection. Getting it wrong and trying to make it right. Not getting your back up is a big challenge. Overcoming ambition is it, the biggest. We all want recognition.