Every campaign gets an Adventure Log, a blog for your adventures!
The Adventure Log will allow us to chronologically order the happenings of the campaign. It serves as the record of what has passed. After each gaming session, come to the Adventure Log and write up what happened. In time, it will grow into a great story!
Best of all, each Adventure Log post is also a wiki page! You can link back and forth with your wiki, characters, and so forth as you wish.
One final tip: Before you jump in and try to write up the entire history for your campaign, take a deep breath. Rather than spending days writing and getting exhausted, I would suggest writing a quick “Story So Far” with only a summary. Then, get back to gaming! Grow your Adventure Log over time, rather than all at once.