Sure, visiting Lima, Cusco, and Machu Picchu in Peru is akin to stepping back in time. Here are some tips to help you plan your trip:

Best Time to Visit:
The dry season from April to October is the best time for visiting. It's perfect for exploring Cusco, hiking in Machu Picchu and wandering around Lima.

Route and Accessibility:
Lima is often the initial point of entry for international travelers. From Lima, there are regular flights available for Cusco. Machu Picchu is usually accessed by taking a train from Cusco to the town of Aguas Calientes, from where it's a short bus ride to the Machu Picchu site.

Altitude and Acclimatization:
Cusco is located at an altitude of over 3,300 meters above sea level. Altitude sickness can be a concern. Plan some days in your itinerary just for acclimatization, especially before you plan to trek or hike.

Accommodation and Booking:
There are various accommodations for different budget ranges in both Lima and Cusco. Reservation in advance is suggested especially for Cusco, as it is the gateway to Machu Picchu and tends to fill up quickly. Also, advance purchase of Machu Picchu entrance tickets is advised as they can sell out.

Clothing and Essentials:
Pack summer clothing for Lima, but for Cusco and Machu Picchu, layering is key. Also, pack a good quality rain jacket regardless of the season. Hiking boots are essential if you plan on hiking the Inca Trail.

Health and Safety:
Stay hydrated and take it slow upon arrival in Cusco for proper altitude acclimatization. It would be good to have travel insurance to cover any unexpected illness or accidents.

Local Etiquette and Respect:
Show respect to the local culture and customs. When visiting religious or historical sites, abide by any guidelines or codes of conduct posted. Remember, Machu Picchu is a World Heritage site and should be treated with respect.