Have you ever had the problem of using the mouse to highlight text on a site and getting portions of other text you did not want? This is usually because the site is using tables or columns you can not see to display its content.
Instead of using the mouse to drag across the text to be selected, position the cursor at the beginning of the first word, hold down the Shift key and position the cursor at the end of the last word. All the text between these positions will now be selected and can then be copied and pasted wherever it is you want to place the text, without any of the items you do not want.
I know this is really a basic thing but, I see a lot of my co-workers having trouble selecting only the text they intend.
By the way, the same technique works in most instances of Windows selection, providing more control over selection.