What is the best way to deal with cracks in plaster?

It is quite normal for small cracks to appear in plaster on interior walls and ceilings, either through drying out in new homes or movement of the building in older homes. Simply cut out the cracks, dust off and fill with a suitable interior filler. Allow to dry, then rub down smooth and dust off to create a clean, smooth surface for decorating. To ensure even porosity spot prime with a thinned coat of your finish.