About 16 years ago my wife bought me a hard bound book with a cartoon of a
guy sitting at his telescope looking at the night sky on the front cover.
It has blank pages.

I log by Date, UTC, sky conditions and lunar co-longitude. I have 3 scopes
and 2 pairs of binoculars. I include what instrument(s) I'm observing with
on any particular observing session.

I use a conversational description and include drawings, when I do one, of
every observing session I've ever done since the day I got it. I've
traveled the world with it in tow and it includes all my observations while
I was in Australia and New Zealand several years ago.

It may not be the most "scientific" approach, but it sure brings back the
memories. I've tried an more professional approach, organized by every
classification you can dream of............. and I never keep it up because
it's more of a chore than enjoyment and fun. AND yes, I observe for
enjoyment and fun.

Good day,
Francis Marion