Help

A great way to get to know what does what in emacs is to use the help

Command Description	Key Sequence
View Help Options	Ctrl-h, ?
View the Emacs manual	Ctrl-h, i
View the documentation of the current Major Mode	Ctrl-h, m
View current key bindings	Ctrl-h, b

File

Command Description	Key Sequence
Open	Ctrl-x, Ctrl-f
Save	Ctrk-x, Ctrl-s
Save As	Ctrl-x, Ctrl-w

Point Movement

In emacs what in other software might be called the caret, or the cursor, is called the 'point'.

Moving the point to specified locations

Command Description	Key Sequence
Go to line	Meta-g, g
Save the point position in a register	Ctrl-x, r, Space, #register_number
Jump to a point position saved in a register	Ctrl-x, r, j, #register_number
Go to top of Buffer	Meta-<
Go to end of Buffer	Meta->

Moving the point relative to current location

Distance	Direction	Key Sequence
Word	Forward	Meta-f
	Backward	Meta-b
Line	Start	Ctrl-a
	End	Ctrl-e
Paragraph	Forward	Meta-{
	Backward	Meta-}
Page	Forward	Ctrl-V
	Backward	Meta-V

Windows & Buffers

Command Description	Key Sequence
Close	Ctrl-x, k
Offer each buffer in turn to be closed	Meta-x kill-some-buffers
Select buffer	Ctrl-x, b buffer_name
Move to next buffer	Ctrl-x, o
Move to next buffer	Ctrl-x, Right Arrow
Move to previous buffer	Ctrl-x, Left Arrow
Vertically split window & select from buffers	Ctrl-x, Ctrl-b
Maximise window	Ctrl-x, 1
Split window horizontally	Ctrl-x, 2
Split window vertically	Ctrl-x, 3
List available buffers for selection	Ctrl-x, Ctrl-b
Insert text from buffer	Meta-x insert-buffer

Registers

Command Description	Key Sequence
Copy selection to register	Ctrl-x r s #register_number
Copy selection from register	Ctrl-x r i #register_number

Edit

Command Description	Key Sequence
Undo	Ctrl-x, u
Begin Selection (set mark)	Ctrl-Space
Exchange point and mark	Ctrl-x, Ctrl-x
Cancel Selection	Ctrl-g
Cut Selection	Ctrl-w
Cut Line	Ctrl-k
Paste (Yank)	Ctrl-y
Copy selection to register	Ctrl-x, r, s, #register_number
Paste (insert) from register	Ctrl-x, r, i, #register_number
Delete (forward delete)	Ctrl-d
Delete Current or Previous Word	Meta-BackSpace
Delete Current or Next Word	Meta-d
Search and Replace	Meta-%