Try not to just randomly add detail/cuts etc. That head has way too many for what they are defining. You are just going to make things harder for yourself by having more points to move around. I'm not sure what tutorial you are following but if its telling you to do these things your probably better off trying a different tut. Try here http://boards.polycount.net/showflat.php...true#Post194545
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http://boards.polycount.net/showflat.php...true#Post194545
Also getting some ref of good topology will help.