Urgent before big - always make sure your groups are safe. Only then look for the biggest move

Just because it puts a stone an atari, does not mean it is a good move

Not every stone is worth saving - a captured stone is worth 1 point. Possibly +1 for the territory. If the stone is not important (not severely cutting anything or needed for life) just sack it. Surely you can think of a move bigger than 2 points

Do not try to kill EVERYTHING - do not be too greedy. If you attack everything it usually means you are also leaving weaknesses everywhere and your whole position may crumble. You only need to get a little more than your opponent everytime.

Do not be a puppy - do not just follow your opponent around answering everything he/she does. Look for a time to take iniciative and try to keep it

Learn to sacrifice something small to get bigger advantage elsewhere

In the land of the blind one eyed man is king ;)

If you lost, find out why - from lost games you can learn the most