Think Green! ;)

 <TABLE WIDTH=100%>
<TR>
<TD WIDTH=50%>Cell 1</TD>
<TD WIDTH=50%>Cell2</TD>
</TR>
</TABLE>


Tables can be a designer's best friend. Visible or invisible they offer almost unlimited layout possibilities.

HTML Goodies has an excellent basic tutorial on tables check it out.

Webreference.com offers another tables tutorial titled "Trials and Tabulations"