Obtaining a Hotel Discount is not everyone cup of tea. It really tough to negotiate with the Hotel Manager.
First of all you need to have good communication skills as well as fluency in the language of the region where the hotel is located. By communicating you can create an impression and go for negotiation and obtaining discount.
If the above way is tough for you can you can simply search for discount coupons, packages offered by various online merchants. Some travel agencies aslo proved dicounted rates on hotel.
You can get offers online if its a tourist attraction season. And you can get discount offseason by negotiating. It very hard to obtain discounts on running season as there are more custumers whereas during off season customers are less.