How do I improve frame-rate in both windowed and full screen mode?

For nVidia card users, to improve your frame-rate in both windowed and full screen modes:  

1. Right-click your Desktop
2. Left-click the nVidia control panel
3. Left-click the Advanced Settings tab
4. Under 3D Settings on the upper left, left-click Manage 3D Settings
5. At the top, left-click the Global Settings tab
6. Under Maximum Pre-rendered Frames, set it to 1  
7. Left-click the Apply button at the bottom.

*These options may or may not improve performance. You can apply any combination of them.*
When first launching the game: 

1. Left click on Options
2. Deselect Anti-Alias
3. Deselect Anisotropy
4. Under Texture Quality select Low
5. Left click on Save