This is an ever-evolving list of stats that I like to count when I review games. Let me know if you have any suggestions or criticism.
Screens for Score- This stat is given when a player sets a screen that directly results in a score for the player whom they screened. Both off-ball and on-ball screens count. I'll also count it if the screen results in the ballhandler immediately passing the ball to an open man for a score, if the open player was a direct result of the screen. Only scores count in this category, as I don't want to get into the discussion of what is an isn't a good shot.
Shots Defended- This stat is counted when a player is able to forcibly make another player miss a shot attempt. Pretty simple, really. Blocks don't count in this category.
Successful Help Defense- This stat is counted when a player is able to generate a turnover as a result of rotating off of their regular matchup.
Points Allowed- This stat is given when a player's matchup scores or when a player is directly responsible for a score. If a player is guarding someone out of their position (IE: A center guarding a small forward), than the stat will still be counted. But if his original defensive assignment is to score against another player, than the stat will not be counted. However, if the player was trapping and let his matchup get open as a result, than the stat will be counted. Fouls do not count towards this category.
Defensive Boards Given Up- This stat is given when a player's matchup is able to get in front of them and take a board. If the player was the shot taker, than this stat isn't counted.
Near Turnover- This stat is counted when a player is responsible for fumbling away or overthrowing the ball, but the ball is otherwise saved by another player on their team. Rare, but it happens.