This is the order that keeps walking to a minimum and leaves the longest day out for last. The 3-day Munich itinerary below assumes you sleep in the center and start each morning on foot.
Day 1: Marienplatz, the Markets and the Residenz
Start at Marienplatz, where the Old and New Town Halls face each other across the square. The Glockenspiel pulls a crowd into the square, and the square empties again within a few minutes.

Midday: Viktualienmarkt
A few minutes south sits Viktualienmarkt, the open food market, and eating standing up there costs less than a restaurant table. It also sets up the afternoon without a sit-down break.
Afternoon: the Residenz
Then the Residenz, the Wittelsbach palace that housed Bavaria's rulers from 1508 until the end of World War I and now runs as a museum full of their treasures. Half a day covers the state rooms and the treasury, which is the block to cut short if the weather turns.
Pass the Frauenkirche on the walk back. Its red roof is the silhouette you will recognize from the postcards.
If you would rather have the old town explained than simply walked, a Munich tour covers the same square, church and palace in one loop, which suits a first afternoon when you are still learning the geography.
Day 2: Museums and the English Garden
Give the morning to the Kunstareal, the museum quarter, and pick one Pinakothek building rather than three. Trying three before lunch usually means remembering a lot of rooms and no paintings.
A morning is a fair first pass through one collection; less than that and you are walking rather than looking. Traveling with kids, the morning is the ceiling, and the park straight afterward is the reward.
Afternoon: the English Garden and the Eisbach
Ride the U-Bahn across to the English Garden, one of Europe's largest city parks, and walk to the Eisbach where it enters the park. Surfers queue on the bank to ride the standing wave in the river, and the crowd that gathers stays longer than it planned. The wave runs whatever the weather, which is why it earns a stop even on a cold afternoon.
Carry on to the Chinese Tower beer garden inside the park and take a long table under the trees. Order at the counter, find a seat, and treat the afternoon as the day's soft landing rather than a stop to rush. Three days in Munich does not need a booked table every night, and a beer garden is how the city avoids it.
If You Still Walk: Olympiapark
Olympiapark, built for the 1972 Games, is the third option and the one to take when the weather holds. It is a short U-Bahn ride from the middle of town, and it works as the late-afternoon stop rather than the main event.
Rain changes the order, not the day. Move the museum block to the wet hours and keep the park for a dry window; the Bavarian State Opera gives you an indoor evening if the forecast is hopeless.
Day 3: Neuschwanstein and Linderhof
Day three starts with an alarm. The coach leaves Munich in the morning, covers King Ludwig II's two castles and returns you to the city in the evening, so the whole outing runs about ten and a half hours and takes the entire day.
Neuschwanstein comes first: the castle sits high in the Bavarian Alps above a valley, which is why the walk up takes longer than the map suggests and why the view back down is the part people photograph. Linderhof follows, smaller than its neighbor and more flamboyant inside, with an artificial grotto and a small lake on the grounds.
You get back in time for a late dinner, which is the right way to end the trip: one long day out, then a table and a beer.
