DO you have a chapter manual from your HQ that suggests what this position entails? That would be the first place to start.
Next, is there anyone in the chapter that creates a scrapbook of events throughout the year? If not, then I'd start there! Take pictures, ask for doubles, etc. You do not have to be the best scrapbooker in the world, just so that you are creating a historical perspective of what your chapter did throughout the year. Don't forget to write about the events. Pictures speak a 1000 words, but actual words will leave an impression for years to come.
Keep track of events! YOu could do a time-line, too. Put in there awards your chapter earned or even applied for.
Does your Secretary keep hisorical minutes? If not this is SO important for your chapter. YOu could start this year if not. You keep these as they are the official record of the business of your chapter. Establish a file system that maintains that history so that future officers can go there ideas.
Best yet, ask your chapter why they created this position and what their expectations are for it!
Good Luck!