Tips for Delhi

1. Get a map before you arrive - although I'm not sure exactly where or how, there has to be a way so find out and do it.
2. Do not allow any friendly Indians in Connaught Place direct you to the "official tourist office", they will inevitably take you to their mate's place where they will try and sell you an over-priced trip with no guarantee of quality and then go for the hard sell when you look like your about to leave. No matter how friendly your new Indian acquaintance may seem, they are most likely trying to scam you when in this area. Smile and walk on. It's the only way.
3. Do not stop for any amount of time in Connaught Place, to relax to think to look at the sky - this will probably result in being swarmed by a number of people trying to take off your shoes and stick things in your ears and they will then try to charge you 1000 rps for the privilege. Again, not fun.
4. When you have your map try and figure out Connaught Place before getting there - it is a maze of letters on columns and streets running horizontally and diagonally and is littered with supposed tourist offices which will rip you off. The official office is the ONLY one that has DDTC written outside it and it is a darkened room with three very friendly and non-pushy Indian men in it who will laugh at you for even vaguely considering walking into any of the other offices - you silly Westerners!
5. If you have a hotel in Karol Bagh your hotel owners will probably also try and rip you off - beware of anyone offering to show you were the metro is and then conveniently taking you to the hotel's own tourist office - ah hem!
6. Book all your accommodation before you get there. Avoid hotels in Karol Bagh and do your research - do not wait until you get there as you will most likely be scammed.
7. Autos are the best way to get around Delhi - make sure you hail one and ask them to use the meter or negotiate a price before you get in. Don't get one that tries to sell to you (thank you Mr Singh on your 38th birthday with your offer of a special (expensive) tour of Delhi, but no thanks).

These things ought to help, but you still might end up prey to a scam. Best thing to do is be angry really briefly and peg it up as experience for the rest of your trip in Delhi.