There are many art resources that we have found to be very useful over the years. All major public galleries have now fabulous websites and you can research entire collections from museums around the world and see some fantastic art. Subscribing to your favourite museums is highly recommended. Commercial galleries have great online presences and showcase the artists they represent. Find some you like the look of and subscribe to their newsletters to be up to date on shows and available artworks, or check out resources like Artsy.