This thesis includes two projects. The first project explored the current pricing strategy applied in American sport industry and analyzed the feasibility to apply overbooking by setting General Admission (GA) district in stadiums; the second project tested and evaluated the impact of an Energy Management System (EMS) in the Statler Hotel. Professional sport teams have been seeking all kinds of methods to make optimal pricing strategy and increase their ticket revenue. As one of the important technologies in revenue management, overbooking can be a potential approach to help sport teams achieve the goal of revenue maximization. A sample consisting of 89 baseball teams, 45 basketball teams and 22 soccer teams was created. Collected data was categorized into Pricing Variable, Performance Variable and Demographic Variable. Descriptive analysis was conducted to explore the pricing situation and how GA has been applied in sport industry. An estimation overbooking model was built to show the revenue increasing impact of overbooking by setting GA district in stadiums. Finally the feasibility to implement overbooking was discussed based on both analysis results and past research. As a major part of energy consumption in hotels, heating, ventilation, and air conditioning (HVAC) is where the hotel can gain potential savings by sustainable technologies. EMS is a common choice hotels are applying. The second project tested and evaluated the saving impact of an in-room EMS named Cassia(TM). A 12-month dataset was gathered from Schneider Electric and Statler Hotel, where the system was tested, to calculate the actual saving by Cassia(TM) EMS. A Multiple Linear Regression was built to explore the impact of temperature setback, make more precise estimation of the system's saving impact on the HVAC runtime as well as the energy cost saving of the hotel. Results showed positive evaluation for the system. The system contributed to an average 20% energy saving on HVAC units and was expected to save 19,962 dollars when all the rooms in the hotel installed with the system.