Tip #1: Learn to spell the place you're staying
Nah but really 8 days in Shinjuku is over kill. I would rather do 2 days there and 8 days in Kyoto. Tokyo is great and all but after 3 days I think you'll want to see something different than endless people, shopping, electronics, etc. I went last year and enjoyed Kyoto and Osaka a lot more so I'd say do some research (or grab a few travel books) because there's a lot more to see than just Tokyo.
Also since you'll probably be taking the bullet train to Kyoto, consider it's $100-150 a ticket so you probably want to explore it more than just 2 days.
Another tip is the street addresses there are just messed up (at least I never figured it out). They number the house addresses based on when they're built and not in numerical order so it's really difficult to find places... not to mention they have to list like 4-5 street names in their address because it's stupid like that. So don't just depend on things like Google maps because it's not that simple - a real map you can hold is important. I'd also say check out some of the high end restaurants in Tokyo because they have a number of 3 starred restaurants if you're a foodie. My mouth still waters thinking about some of the great places I ate at in Japan.
