Also in case no one knew which sub-bending skill went under what I have made a list of the different special skills you guys can learn.

Air:
Flight
Spiritual Projection

Water:
Bloodbending
Healing
Spiritbending

Earth:
Lavabebnding
Metalbending
Seismic Sense(Like how Toph and the Beifongs sensed things by hitting the ground with their heel or foot)

Fire:
Combustionbending
Lightning Generation
Lightning Redirection

[url]http://avatar.wikia.com/wiki/Specialized_bending_techniques[/url] here is the list with a description of the skills

Another interesting thing I found was Energy Bending which I discovered is what Aang and Korra used to take or restore a persons bending ability