Define a new command as follws:
\newcommand{\comment}[1]{}
You can then comment multiple lines as follows:
\comment{text to be commented}
When submitting camera ready copies, it is usually required to embed all the fonts in the PDF. For this, first create a postscript file using dvips and then use the following command to create the required pdf:
ps2pdf -dSubsetFonts=true -dEmbedAllFonts=true -dCompatibilityLevel=1.4 -dPDFSETTINGS=/prepress -sPAPERSIZE=letter input.ps output.pdf
The optput pdf is of US Letter paper size.
Sometimes, the tables span more than the textwidth. In such cases, use this package: \usepackage{changepage}
and then adjust width of tables using following:
\begin{table}
\begin{adjustwidth}{left side adjustment, e.g. -1.5in}{right side adjustment, e.g. -1.5in}
...
\end{adjustwidth}
\end{table}