Don't Shoot Back lit ............

or side lit unless you know how. You can't just point and shoot in aperture or shutter priority and expect to get a good exposure. Those auto modes are not set up to meter well in anything but front lit situations. If you shoot in an auto mode then you need to use exposure compensation, (usually you need to add ev or ec, not subtract), or go old school and shoot in manual mode so you have total control over the light and what you're shooting. There are plenty of websites with a ton of information about metering and how to shoot in challenging lighting conditions, if you have trouble with shooting back lit, do some homework. I will be deleting dark and flat, badly exposed back lit images.
Here's a great example of a nicely exposed side lit image from photographer Jann Hendry.

Jann was shooting in manual mode and metering off her subject.

and here's a great back lit batter shot from Jann.