Some great strategies to ensure your are getting the most profit in the fourth quarter are:
Get your website ready for increased traffic.
Take advantage of the holidays by creating and scheduling holiday specific content ahead of time, humanize your brand by posting non-promotional holiday-cheer focused content, and sending promotional emails at strategic times so you don't upset your followers.
Segment and clean up your email lists so that you can run successful re-engagement email campaigns.
Use what has worked in the past instead of trying to experiment with new ideas.
Plan ahead of time so that you aren't stressing out over your campaigns.