Vim basic usages
Basics - Character-wise movements with the home keys: h, j, k and l.
Line terminus - Beginning of line: ^ or 0(non-blank). End of line: $.
Forward word movement - word and WORD: w and W, e and E.
Backward word movement - word and WORD: b and B, ge and gE.
Move to character - f, F, t, T
Paging - Full page: CTRL-f and CTRL-b. Half page: CTRL-u and CTRL-d.
Scroll - One line: CTRL-y and CTRL-e.
Cursor jumping - Head, middle and last line of a screen: H, M and L.
Top and Bottom - gg and G.
Jumping to a particular line - (number)G or :(number).
Seach current word - * and #, or g* and g#(no word bounds).
Regular expression searching - / and ?. Next and pervious: n and N.
Start of Function or Class Jumping - Beginning of previous and next functions or classes: [[ and ]]
End of Function or Class Jumping - Forwards and backwords to the end of a function or class: ][ and [].
Jumping to Matching Braces - The fantastic % characters.
Marks - Basic mark functionality and how it works with m, ' and `.
Insert - i and I can bring you into the insert mode. Insert before the current character by hitting i. Insert at the beginning of the line by hitting I, which equals to ^i.
Insert with a New Line - Use o(O) to insert with a new line after(before) the current.
Insert with Append - Insert after the current character by hitting a. Insert at the end of the line by hitting A, which equals to $a.
Replacing Characters - Replace single character under cursor by hitting r. Switch to replace mode by hitting R.
Changing Things - Change things by c + <text object> or c + <motion>. cc to change the whole line and C change from the current character to the end of the line, which equals to ^c$ and c$.
Deleting Characters - Delete a single character under the cursor with x and before the cursor with X.
Deleting Things - Delete things with d + <text object> or d + <motion>. Delete a single line with dd and delete to the end of the line with D.
Repeat - Repeat the last command by hitting ..
Yanking - Yanking means “copying”. Yank(copy) with y + <text object>. Yank the whole line with yy.
Putting - Putting means “pasting”. Once you’ve yanked, you can put with the p (put after) or P (put before).
Joining - Join lines with the J. But if you don’t want the extra space, you need to use gJ.
Visual Mode - Use the v key for character-wise visual selection, V for line-wise selection and ctrl-v for block-mode selection. Use gv to help you re-select an area you just selected.