Places to Visit
Start in Phuket
Heaven on Earth! A must visit if you are going to Thailand. Lots of beaches and then boat trip to Phi Phi island.
Go to Krabi
Come to Bangkok
If you dont have enough time, skip Krabi or Phuket. I would skip Krabi if its your first time.
Visa for Thailand
For Indians, you can do visa on arrival.
During the peak seasons it may be worth to stamp it from here and go. This would avoid you standing In the queue for visa.