I mostly use my camera on Manual mode, even in the evening and low light conditions.
I use the 15MP setting. Then, you can choose Exposure on the left side of the screen and the White Balance. When you have the right WB (you will surely chose the one that best fits YOUR eye, you can try changing the Metering settings. These are really great for many shots like portraits and Macro photos. You can search for Metering settings on the Internet. Last thing I chose is the ISO sensitivity. For brighter scenes you can decrease it, but for low light you can make it higher to catch more light.
Try out these settings in any possible way, you will upgrade your knowledge in photography, but the possibilities are endless.
All the best.
Proud ex-owner of Sony Ericsson Xperia X10i, Sony Xperia S and proud owner of Sony Xperia Z1!
Check out my Sony Xperia Z1 photos HERE