Yeah it's usually easier... especially when you're dealing with a lot of nested tables. If you see a big jump in indents, that suggests you've either missed a few closing tags, or forgotten them.
Example:
Code:
<table>
<tr>
<td valign="top">
This is some text
</td>
<td>
<table width="100%">
<tr>
<td>
Some more text
</td>
</tr>
<tr>
<td colspan="2">
This is yet more text
</td>
</tr>
</table>
It could be hard to notice errors in code like this (but far more complex, I only used this as an example)... this is much easier:
Code:
<table>
<tr>
<td valign="top">
This is some text
</td>
<td>
<table width="100%">
<tr>
<td>
Some more text
</td>
</tr>
<tr>
<td colspan="2">
This is yet more text
</td>
</tr>
</table>
You can see the big jump in space between the text and it's ending TD tag.