A little tip for the future: Do Not take too many photos at one time. You could end up with numerous photos that look bad and only a few that appeal to your liking. So just take a few and if those don't turn out well (while you are still at the place) then delete them and take a few more- maybe on a different setting.
Here are a few ideas that could save you some precious time:
#1. Find out what kind of lighting (if indoors) is being used like florescent, incandescent, or just sunlight. Set your camera to the correct light setting and see how the photos turn out.
#2. Is the subject running, flying, etc? Change your camera's current setting to the 'Subject tracking' mode.
#3. And last but not least, Portrait mode. This was discussed in the earlier Post: 'Portrait, anyone?' and is very important for a close-up of one person or two people together. You can read the post 'Portrait, anyone?' anytime.