If you can see that dwyrin is talking about you here, watch his lecture on aji. It is quite possibly the best lecture focused on kyu players I have ever seen. It discusses how whole board and local position thinking relate and how aji is created and use and misused - or even ignored.

If you are willing to look at your own games critically you can take a lot from this lecture. It's just 45 minutes and it looks at a kyu game where white could have run away with a free win only to find himself fighting to the end.

I'm just at the point now where I'm starting to really notice what he is talking about in my own play. I am having to fight my kyu-ness every game - force myself to read, force myself to pay attention to the whole board, force myself to stay consistent with my moves. And this lecture is perfect for that. In my last game I posted on my study journal my opponent made one of these kyu mistakes by killing 4 stones of mine to take sure profit instead of focusing on keeping me out of his center. But so often I don't see when I'm making those kind of moves and I think "Yes! I just captured 5 stones! That's 10 points for sure!" but I let my opponent make 20 points in exchange...

_________________
"You have to walk before you can run. Black 1 was a walking move.
I blushed inwardly to recall the ignorant thoughts that had gone through
my mind before, when I had not realized the true worth of Black 1."
-Kageyama Toshiro on proper moves

I think part of the problem of some players is that they tend to attack never to kill... So they tend to always try to attack in a way that is not severe itself.

I prefer to say, attack is to kill if the other doesn't respond