Steven in NJ says:
Recently, I've changed my camera setting back to "fine" for better photos but now I am delivering photos that are over 10Mb and the MLS does not allow uploads over 10Mb. Any suggestions on how to deliver the best quality photos and still stay under the 10Mb limit?
Most people control the size of the files they deliver in Lightroom when they export them. Assuming you are creating your delivery files in Lightroom this tutorial by Trevor Dayley will probably fix your problem. Trevor shows how dropping the quality slider a little in Lightroom Export reduces file size significantly without negatively impacting the quality of the image.