Be warned! I thought that puzzles will do me good, but instead it turned out to be disastrous for my game. I decided to decrease my blundering rate and I spent an entire day doing puzzles. My puzzle rating went up to 2400 from zero. When I went back to the game the next day, I practically tripled my blundering rate. I've never played so bad as if I had become suddenly blind.
I believe that the reason is that when practicing puzzles there is always a forced way to win and all other pieces not involved in the master plan are passive expendables that you tend to condition your brains to ignore.
However, in a real game, blitz or otherwise, you are not always having a forced way of winning when your spot an potential opportunity.
I wish there were more tricky puzzles where it is not clear if there is a forced way to win or not. One has either find a way to check mate or indicate that it's not possible. This would help with decreasing your blundering.
I strongly agree with this
How to stop blundering? - Stop playing chess
Best advice I’ve seen in my entire Chess career.