⌘↑ Move to Beginning of Document
⌘↓ Move to End of Document
⌘← Move to Left End of Line
⌘→ Move to Right End of Line

⌥↑ Move Paragraph Backward
⌥↓ Move Paragraph Forward
⌥← Move Word Left
⌥→ Move Word Right

⌃← Move Subword Backward
⌃→ Move Subword Forward

Subwords are the words within a camel case compound. A good example is the compound GarageBand. If you want to move between “Garage” and “Band”, use the two key bindings above.

↑ Move Up
↓ Move Down
← Move Left
→ Move Right

Holding down the shift button enables you to extend the current selection. As a plus, these key bindings also work on most Cocoa apps. Learn once, apply almost anywhere.