One of the aspects of the roleplaying that I really enjoy is producing campaign wikis/blogs, etc that provide more of an insight into currently running games and campaign worlds, it lets me keep my writing-hand in, keeps up my enthusiasm between games and also helps refresh my (unfortunately poor) memory concerning the salient details of the campaign.
Another benefit–and one that I don’t see mentioned all that often–is that doing this work has encouraged me to read information that I might not have looked at before.
My most recent example of this came whilst I was setting up a series of pages on this site for my Rose of Westhaven campaign, particularly the entries concerning the fictional calendar that I have created–using Donjon’s excellent Fantasy Calendar Creator–for the game. Days, months, seasons, moon phases and all those sort of things that go into a calendar are elements that I have often neglected in past game and I’m hoping to bring them more centre-stage to my campaign. While setting up the three moons of my campaign world using the calendar, it occurred to me that I had no idea what the figures in the lunar cycle section of the calendar creator were referring to. A quick search on Google and Wikipedia lead to me reading a wiki-page about the Me tonic cycle and various methods of measuring times used by different cultures throughout history.
All of this was information that I had not even considered before and–even if I only remember a fraction of it–it has still educated me and will hopefully enrich my game in the future. When you’re writing up your session notes in future, if you see something that you don’t know much about whether it be a style of architecture, settlement demographics, religions or whatever, spend a few minutes reading around the subject on the internet, you certainly won’t make anything worse by having more knowledge.