Seeking blunder cure

to check for tactics that your opponents have then think, why did he go there? What is the purpose of that move Always look for hanging pieces in tactics rich positions. If you're missing hanging pieces then maybe take a second to think a little longer.

Remember that seeing tactics on a tactics puzzle and seeing tactics in your actual games are two related, but not identical scenarios. Spotting tactics in puzzles does not necessarily equate to spotting tactics in your games.

Personally I like seeing tactical positions - for me it's fun being shredded by opponent's tactics and shredding my opponents' positions because of my tactics.

Interesting. I wonder whether having the board orientation might be a contributing factor. When doing puzzles it is usual to see the board from just the attacker's perspective. Hence may only be learning offensive patterns. Older printed books on the other hand often have the board oriented with white at the bottom and would therefore learn defensive as well as attacking tactics.

Your rating on the tactic trainer does not mean squat. Tactics flow from superior positions, and you will never get superior positions by blundering pieces. There is no cure to stop blundering, otherwise this game would have been solved already. What you can do is double check what you can do, and what can your opponent do next turn. The more you do that, the faster it will become a habit, and you will become a better player.

I don't think it's a matter of embracing or avoiding tactics rich positions, but rather acknowledging that maybe chess isn't 99% tactics like some like to claim. There are a few ways that tactics become available, an opponent hangs a piece, your opponents king isn't safe, you have a space advantage, or you have well-cordinated pieces. Think about when is a knight or bishop more valuable than a rook? When is a combination of minor pieces better than a queen? When is a gaining material actually making my position worse? And of course you need to ask does my opponent have a strong attack I need to worry about? Chess is complicated

I think number 2 hits the spot. I don't always 'see' the entire board. But looking to see all the things the opponent's pieces can do would definitely I think. 

There is no way to guarantee absolutly not making blunders. Even GMs can make them. As noted above you can take steps to lessen them. The two most important steps are 1. playing experience and 2. taking longer to evaluate the consequences of every move. (Remember what Lasker said, "When you see a good move, look for a better one.")

With that in mind, this checklist should help.

if you make sure you check all of the checks, captures, and threats (the hardest ones to see),  before every move you will reduce your blunders by alot. It's easier said than done though, you can have times where you forget until you make it a habit and it is subconscious thing you do.

You need to study tactics over and over again. The same tactics, too. That will ingrain the patterns into your mind so you don't blunder as much.

I advocate chesstempo.com for improving upon tactics. Chess.com, I feel, lacks the depth and precision with some puzzles in particular, and moreover, I don't appreciate how there must be restrictions imposed on the no. of puzzles you can complete. Still, the trainer is decent.

Thank you everybody for help and advice. It has certainly been helpful. However, there still remains the question of two apparently contradictory statements I have frequently come across, namely "concentrate of your weak areas" and "play to your strengths". For me it makes great puzzlement. If I have a weak area (A), and a strong area (B) then the first statement suggests I should do (A) while the second statement suggests (B). 

Don't worry about that, at your rating what matters first and foremost is tactics.