Yes, many good advices here.
Play offline or don't play more than 2-3 games in a row. Focus on creating balance in game. Try to develop style that focus on longterm win and/or study players with quieter/patient style, such as Takagawa Kaku, younger Lee Changho, Otake Hideo, Qiu Jun & Park Yeong-hun. Learn to be comfortable being behind until endgame. Focus more on winning during endgame. Increase endgame problem study. Or set clock-timer goals.
Phoenix wrote:As a side note, I've been ditching solid territory for superior influence recently. It's done wonders against weaker players, but I fall apart against stronger ones.

Good for you : )
Yes, because by the time you reach such stronger players they will know how to counter influence, so then finding balance and being flexible becomes even more important.
This game by Takemiya sensei is one of his masterpieces. He of course goes for influence, but when his opponent tries to deny him this, then his flexible and deep strength truly emerges. Top/right exchange, then fighting that begins on left are highlights of the game. White 42 is grand move.
http://www.lifein19x19.com/forum/download/file.php?id=2367
Another masterpiece example is of Takagawa Kaku. He was famous for saying, "Flowing water does not fight what lies ahead." In this game, you can see how Sakata tries to upset Takagawa's stones repeatedly, but Takagawa quashes his attempts each time moving continuously into different parts of the board, like "flowing water."
http://www.lifein19x19.com/forum/download/file.php?id=2368