Change the exposure compensation to take a lighter picture
By setting the flash mode to flash off and compensating the exposure towards the [+] you can get a lighter, fresher look. Always checking the playback picture, choose a somewhat larger compensation. To be on the safe side you can take several pictures with different settings. If the indoor light is not enough, you can set the shot near a window that lets in some natural light.

For table-top pictures, though it depends on the subject, you can get a lighter, fresher look by compensating the exposure towards the [+]. Take several shots compensating the exposure to get different brightness levels. In such cases, you can try using the auto bracketing function (BKT) if your camera has it.

Compare the effects of different exposure compensation values 

No exposure compensation	Exposure compensation at +0.7

Exposure compensation at +1.3	Everything is included in the frame resulting in an ordinary, featureless picture

Useful things to remember

You can take a really attractive picture by focusing on only one part instead of including everything in the frame.
If you stabilize the camera and cannot focus precisely on the point you want, set the AF MODE to [SPOT] or [AREA]. You
    can assure the camera will focus on an exact point by placing the AF target mark over it.
To reduce unwanted shadows falling over your subject, use a drawing paper or a similar white sheet of paper to reflect
    some light from a window onto your subject. Open "Useful Tips: Control the amount of light to avoid shadows"
Indoor light conditions are seldom as bright as when shooting outdoors. Stabilize the camera by using a tripod or other
    similar equipment.