To plan a Ladakh trip, you need to consider the best time to visit (summer months), get an Inner Line Permit (ILP) if needed, book flights to Leh, prioritize acclimatization, plan your itinerary around key destinations like Nubra Valley, Pangong Lake, and Tso Moriri, and ensure you pack appropriate clothing for high altitude conditions and sun protection, while also considering any adventure activities you might want to do like trekking or biking.