I'm in a profitable niche right now. Manage to get $420 few days ago in just one day; and yesterday about $200. The problem is... my site is ranked on the 4th or 5th position. I believe I could get even more leads if I'm on the first position. What other ways (whitehat backlinking) can I do to increase my position? Does Linkwheel really work? I've heard of reports that people got sandboxed after using it.