A lot of people probably know by now that you shouldn't copy directly from
MS Word into a WYSIWYG editor. At least not without using the special "paste from Word" function.

But what if somebody gives you an Excel file containing data to "paste" into a website. Well with any luck they have typed everything into the "A" column of the table.

In that case, just copy and paste the single "A" column into your WYSIWYG.
You'll probably get a skinny single column table but you can fix that by right clicking, selecting Table Properties, and entering directly the height and width of the table in pixels.

With any luck it will save you a few hassles.

You can also save most files in Office applications as .htm or .html and then just copy the code over.