If you have been procrastinating that trip to the Andaman Islands, I recommend you plan your holiday without further delay. It is the most satisfying experience you'll have if you love the beach and what's best, you'll do it without drilling a hole in your pocket. For those on a slightly tight budget, Havelock is your pocket friendly substitute to Maldives/ Mauritius/ Bali (beach wise). The beaches are not crowded, there are few tourists and a handful of restaurants/ cafes and if you spend 2 days on the island, you'll practically start recognising people because there are so few! Rent a bicycle and enjoy your stay!
Once you land in PortBlair, take the ferry to Havelock Island. It costs around INR 1,200 one way. The best thing about Andamans is the extremely poor network connectivity. You are literally cutoff from the rest of the world.