A retro kitchen remodel can be anything you want it to be, since retro just refers vaguely to something in the past. So you can do a 1930s farmhouse kitchen or a 1950s black and white design or a 1970s style with stained wood cabinets and still call it retro. Pick your era — maybe start with remembering visits to Grandma’s for cookies or for a holiday dinner, or think back to the first house you bought with what was then a stylish kitchen. Start planning when you’ve chosen a target.
Watch movies from your chosen period to recall what was fashionable in the post-war building boom of the 1950s and 60s, the flowery look of the 1970s or the colored cabinet faces and tile countertops of the 1980s. Look at design manuals, especially from your era, and ask friends what they remember about kitchens of those years.