Well Mr. Bhusan i am living in delhi since last 5 years and have seen almost every place of delhi. So based on my experiences i can suggest you some must visit places: Day 1: Experience the heart of delhi by visiting old delhi vis-a-vis Chandni Chowk (do loads of shopping & eat parantas, jalebis), Red fort & Jama Masjid. You can cover all three in one day as all are nearby. Day 2: Visit financial, commercial & shopping hub & centre of Delhi "Connaught Place", India Gate & Humayun's Tomb. Day 3: Visit Kalkaji mandir, lotus temple & Akshardham temple (don't miss the evening light show) Day 4: Visit Qutub Minar, Chattarpur Temple & Hauz khas village. All are nearby Day 5: Keep it for only shopping. Visit Janpath Market, Sarojini nagar & lajpat Nagar Day 6: Come to gurgaon and visit Kingdom of Dreams & Cyberhub Day 7: Keep the whole day for Worlds of Wonder in Noida (Water & Amusement Park) Welcome to Delhi. Hope you have a great time!!!
I have been for 4 months and as I hate crowded places( which is impossible in Delhi to find) so I would recommend you Qutub Minar at early morning approx.7(you can hear bird chipping and a refreshing morning)
Lodhi Colony Lodhi Garden( not in Sundays)
India Gate ( morning magic happens here)