We ♥ Google Maps! It is an incredibly useful planning tool and especially indispensable for traveling in Japan. We add all the sites we want to see and use different icons to create loose categories (parks, shrines/temples, shopping, food, etc.) This helps us to understand the proximity of the various sites we want to see and allows us to group things together to form our itinerary. We use the step-by-step walking directions to determine if things are really as close to each other as they appear to be. It probably sounds mundane, but it's actually pretty cool.