Stroll through the central city, visit Marienplatz, experience the glockenspiel at 11am, 12 noon, and 5pm May thru October. Stop for a coffee and eat at numerous outdoor venues. Go below to explore food markets, specialty shops, and tiny eateries. Visit the Olympiad and the BMW museum for a great day trip, pick a museum and a castle, do a beer garden, sample the different pubs, restaurants, and sandwich shops.
Explore the Hauptbahnhof (main railway station). Visit Dachau. It should be seen.
Quick Tips:
Pick up a city map, it will be your bible. Do Dachau on Sunday as most shops in the city will be closed. Obey the traffic signs and signals. Munchens do not jaywalk nor run lights. Make use of the concierge or reception staff at your hotel, they are knowledgeable and they want you to have a pleasant visit.
Best Way To Get Around:
Purchase a Munich Welcome Card - 22,50 Euro for a family of five for three days. This will allow transport on all trams and buses U and S bahn (subways). For airport transportation use the bus at 9 Euro - it's a bargain. Walking, walking, and walking.