I've read another blog today about Efficient Editing with Vim. I learned some new tricks as the follows.
* g + h,j,k,l, to move screen line instead of real line. This can be real useful when you are editing an email with long lines.
* fx, Fx, go forward/backword to the next occurrence of x.
* (, ), move to the next sentence or the previous sentence
* xG, goto the xth line, the same as :x, just faster
* H, M, L, move to the top, middle, and end of the screen
