Our group has stumbled across a simple, effective tool for generating excitement about a new campaign. It is this:
When starting a new game, try to get in two quick back-to-back sessions before settling into a comfortable gaming schedule.
For Autumn Frontiers, we managed (by pure luck, it seems) to play on a Thursday and then again the following Saturday. Two sessions in less than five days -- that was a herculean scheduling feat. But it managed to stoke the imaginations of both the players and the GM, thereby giving legs to a campaign that might otherwise have muddled along. I had to plan for two separate sessions, and the players got a chance to fine-tune their character concept with the followup session on Saturday.
It's a simple thing, but I'm glad our busy lives allowed for a quick burst of gaming to start off a new campaign.