You can actually go into the Tactics Trainer settings page at http://www.chess.com/tactics/settings.html and switch to "unrated" training mode and then "save". Then you can enjoy the Tactics Trainer without the added stress of the timing.
Tactics trainer time

You can actually go into the Tactics Trainer settings page at http://www.chess.com/tactics/settings.html and switch to "unrated" training mode and then "save". Then you can enjoy the Tactics Trainer without the added stress of the timing.
I guess a lot of people don't know that. I didn't.
Why don't the people who want an untimed tactics trainer just let the time run out on the timed one if they need it to, and not worry about it?