A real guide built from my actual trips — I live 45 minutes from Tokyo and have taken almost everyone I know to these exact spots. This is what I tell them.
Marissa's Tokyo Tips
Get a Suica card on arrival — tap on/tap off for every train and bus. Load it with ¥3000 to start.
Download Google Maps offline for Tokyo before you land. The subway looks scary but you'll get it by day 2.
Cash is still used everywhere. Get yen from the 7-Eleven ATM — lowest fees for foreign cards.
Summer in Tokyo is HOT and humid. Light clothing, a portable fan, and sunscreen every day.
Convenience store food (7-Eleven, FamilyMart) is genuinely good. Don't skip it.
Be quiet on the trains. No phone calls, keep your voice low. Locals notice and appreciate it.