Buddy up for a hotel room! Between 2 or 3 people, the room rate can be split up amongst the occupants. Look for hotel rooms that have multiple beds and/or a sofa bed.
Look for conference accommodation packages! Usually, discounted rates are offered for student attendees and sometimes first time attendees.
Compare hotel rates based on location! Hotels closer to conference headquarters tend to be more expensive, while hotels farther away tend to be cheaper. Also, hotels, especially the hotel that serves as the conference's headquarters, set a special room rate for conference attendees.