Accept a draw if:
the game is a drawn position
or
you are ahead in piece count but low on time *
or
the game is even, but your opponent is much higher rated than you.
Otherwise play on and hopefully win the game.
*The exception to this is if your opponent has insufficient mating material. Then you should play for the win, because if you do run out of time the result will be a draw anyway.
I've had a lot of people lately offer a draw when they were in a losing position. Does anyone know the etiquette around this? Is it good sportsmanship to accept a draw from a winning position? Or is it just a last ditch attempt to not lose? I don't feel like I would ask for a draw from a losing position, I feel like I'd resign and take my medicine, but maybe that's not right?
Thoughts?
(By the way, I don't mind if they ask, I'm just not sure if it's bad form to not accept)