How to find suitable Internet Service Provider(ISP)?

With lots of options available for ISPs, we often choose a never ending trouble.
Here are the helpful points to ponder while selecting an ISP:
1- Choose right broadband type(Cable Modem, DSL or Fiber Optics) available in your locality.
2- Rental Plan based on the speed required. Rent may vary with Data capping or unlimited surfing.
Quarterly, half-yearly or annual plans mostly come with lower rentals.
3- Internet Speed as per the usage, whether office or Personal. If multiple users at home, then Speed becomes Key factor.
4- Technical Support is most sought reason with an ISP, specially when something goes wrong.