Move around:

h - left
j - up
k - down
l - right

ctrl == ^
^E - scroll down the window
^Y - scroll up the window
^F - scroll down one page
^B - scroll up one page
 H  - move the cursor to the top of the window
 M - move the cursor to the middle of the window
 L - move the cursor to the bottom of the window
 G - move to the bottom of the file
gg - go to top of the file

NAVIGATE
 b - move to the beggining of the next word
 e - move one word to the right
 w - move to the next word?

TEXT OBJECTS AND MOTIONS
--------------------------------
TEXT OBJECTS
 w - words
 s - sentences
 p - paragraphs
 t - tags (available in XML/HTML files)

MOTIONS
 a - all
 i - in
 t - 'til
 f - find forward
 F - find backward

COMMANDS
 d - delete
 c - change (delete, then place in insert mode)
 y - yank (copy)
 p - paste
 v - visually selection


dd/yy - delete/yank the current line
D/C   - delete/change until end of line
^/$   - move to the beggining/end of line
I/A - move to the beggining/end of line and insert
o/O - insert a new line above/below current line and insert

COMBINE THEM!
{command}{text object or motion}

ex: diw - delete in word
    caw - change all word
    di[ - delete inside []
    da[ - delete inside [] and the [] too
    dt' - delete until '
    df' - delete until ' including '
    yi) - yank all text inside parenthes