The quickest fix you could do right now would be to play 15|10 games if you are having time issues. If after trying this new time control you find that you still have endgame issues, start studying up on it.
I mostly read books such as Silman's Complete Endgame Course and that helped quite a bit. I think chess.com also has a few lessons on endgames but I haven't checked them out yet. You could give those a shot too.
At the end of the day, a beautiful opening and middlegame is pointless if you can't win a winning endgame, yeah?
Has anybody any advice for what I should be doing to up my score? I am playing 10min games and quite often struggle time-wise, should I go for 15min games? Also I seem to have reasonably good openings, but my end game is woeful, dont know if thats a time thing, any advice would be appreciatted.
thanks
Gram