Emacs + LaTeX, even easier

OK.

sudo apt-get install auctex

This thing can give you a whole new style of syntax highlighting dedicated to make your LaTeX life easier.

Changing fonts
C-c C-f C-i \textit{} - Italics
C-c C-f C-b \textbf{} - Bold face (In math mode, this will invoke the \mathbf{} font)
C-c C-f C-e \emph{} - Emphasized
C-c C-f C-s \textsl{} - Slanted
C-c C-f C-r \textrm{} - Roman
C-c C-f C-f \textsf{} - Serif
C-c C-f C-t \texttt{} - Typewriter
C-c C-f C-c \textsc{} - Small Caps
If you want to change font attributes of existing text, mark it as a region, and then invoke the commands.

Sections, Environments, formatting, etc
C-c C-s \section{} \chapter{} \subsection{} - Sections
C-c C-e \begin{} & \end{} - Environment
C-c ] - Close Environment
C-c C-m - Macros
C-c RET(Enter) - Macros
C-c C-j() - Newline with \item inside itemize and so
C-c { - Insert balanced braces
M-q - Fill and indent current paragraph (format it)
C-c C-q C-e - Format current environment

Commenting
C-c ; - Comment current region
C-c : - Uncomment current region
C-c % - Comment current paragraph

Running and viewing
C-c C-c - Run LaTeX on text
C-c C-c after compling - Default View
C-c ` - Go to the next error
C-c C-t C-p - Toggles between DVI and PDF output

Queried search and replace
To do a queried search and replace (with a prompt for replacing each occurrence of a text string), press M-% . You will then be prompted for your search and replace strings. Emacs will find and display each occurrence of the search string and ask you for further instructions. You can respond with any of the following options:
Spacebar Replace text and find the next occurrence
Del Leave text as is and find the next occurrence
. (period) Replace text, then stop looking for occurrences
! (exclamation point) Replace all occurrences without asking
^ (caret) Return the cursor to previously replaced text

If you type any other character, Emacs will stop looking for occurrences and execute the character as a command. To restart the queried search and replace, type:
C-x M- M-RET