Here are some tips which I could help people in getting discount for hotels.
Avail offer by downloading Apps like makemytrip.com, Trivago.com. etc.
There are many websites that offers discount or coupons on online booking they are:
http://www.goibibo.com, https://coupondunia.com, https://cleartrip.com https://travelguru.com, paytm.com, https://redbus.com, https://yathra.com etc.
Contact your nearby travel agency about hotel room rent and discount etc. you can pay money on online through debit or credit cards.
Some hotels may be non-refundable so, please check before booking a hotel.
So, select hotels that allows to cancel your booking without levying any cancellation charges.