I'll try and add some here too. But there is lots of related info there.
When you are playing people don't focus on whether you win or lose a point, a game or a match. Focus on playing the point you are currently playing to the best of your ability.
More than any other game or sport I can think of, table tennis is a game of levels.
When you are playing someone who is a higher level than you, you can end up feeling like a fool who can't play for your life because of how much this game is affected by technique and skill level. You can lose several points in a row because you were not prepared for the placement or the spin that was given to you.
When you are playing and the other person keeps winning points, just keep focusing on trying to be as focused as possible and trying to learn from what you are not prepared for. It is very common to look at a ball that is coming at you slowly, think it is an easy ball and totally mess up and think you are just messing up. That is not an easy ball. If you mess up, there is usually a reason. As you get better, you play people who are even better and it happens again.
Ma Long makes guys who are really darn good look like fools who can't play quite often. In 3 different WTTC Semi-Finals (2009, 2011 & 2013) Wang Hao used the short game and the Jedi mind trick and made Ma Long look like that too. And those lessons, learned at the hands of a master like Wang Hao have helped Ma Long become the truly great player he has grown to be.
So learn as much as you can from those lessons at the hands of someone who throws things you are not ready to handle at you. Sometimes it is even a player who really isn't good and they just keep giving you these odd junk balls that you mess up on. That means you need to work on them.
I have a friend, (for NextLevel--SmashFan) who plays matches with me and purposely switches from attacking mercilessly to giving me garbage balls so I will be ready for everything. He does this to help me get better. And man it works. No question. But there is always higher level garbage.
Just keep an open mind, stay focused, try to have fun and learn as much as you can from when you feel like you are not playing well.
Sent from Deep Space by Abacus