Absolutely. Here are some travel tips for your visit to New York City, Boston, and Toronto:

Best Time to Visit:
Each of these cities is beautiful in different seasons.
New York and Boston are lovely in Autumn (September to November) when leaves are turning, and the weather is mild.
Spring (April to June) and fall are also a good time to visit Toronto due to the pleasant weather.

Route and Accessibility:
Flying is the fastest way to travel to these cities.
New York is well connected with many direct flights from major cities.
From New York, you can either fly, drive, or take the train to Boston.
From Boston, you can fly directly to Toronto.

Altitude and Acclimatization:
These cities aren't at significantly high altitudes, so altitude sickness isn't a concern.

Accommodation and Booking:
All these cities have ample hotel accommodations ranging from budget to luxury. Airbnb is also a popular choice.
It's always better to reserve your accommodations in advance, especially during peak tourist season and major holidays.

Clothing and Essentials:
Pack clothing appropriate for the season. Carry a good pair of walking shoes as these cities are best explored on foot.
Don't forget your passport if you're travelling from outside of North America.

Health and Safety:
Follow basic safety tips like keeping an eye on your personal belongings.
Stick to the touristy areas, especially in the evenings.

Local Etiquette and Respect:
Be respectful of local customs and etiquette. Tipping is customary in these cities, usually 15-20 percent of your total bill before tax.
Lastly, embrace the multicultural spirit of these cities; try to explore different neighbourhoods and indulge in the local food, music, and culture.