blocks not lining up

ok I want a part of my site to look like this



but its comming up like this



how do I do that?

 

<table border="0" align="center">
<tr><td>

<table border="0" align="center">
<tr>
<td>Left side content here</td>
<td valign="top">Right side content here.</td>
</tr>
</table>

</td></tr>
</table>

 

thanks alot