Making the most of a grey day by photographing still life compositions indoors is a very good way to experiment with lighting, depth of field and, of course, putting together a still life 'montage' that works.
Once good place to find inspiration is to look back on the great still life painters from the past and to see whether one can re-create a modern version of one of their images. Whether it is the lustre on grapes in a bowl of fruit or the dust on leather bound books or the draping of cloth over a table so that each fold has its sensuality, each of these present a challenge that is not only fun to photograph but also helps me when I next set up a portrait session and want it to be given a context. Or photograph a specific detail in an old room to capture its history or mood.
Static things don't have to be dull. The juxtaposition of objects, whether complementary or deliberately clashing to create a slightly surreal effect, can give energy and wit to a still life. That piece of modern glass that has been locked away in a cabinet - can it be brought to life by being photographed in front of a piece of velvet with some backlighting? Or that collection of marbles - how can they be photographed to capture an image that is redolent of childhood? Or those wilting flowers you were going to throw out - don't they have a faded beauty that says something completely different and, arguably, more interesting than when they were fresh?
A grey day need not be a wasted day photographically speaking. Light up the indoors instead.