Please Read These Tips / Guides To Cometitive Tf2.

http://ozfortress.com/showthread.php?t=40346 <--- V. Imp Please Read.

http://ozfortress.com/showthread.php?t=37274 <--- This is how we need to communicate so please read this aswell.

http://ozfortress.com/showthread.php?t=37375 <--- This is how you get good at some class / Tf2. A must read.

http://asiafortress.com/thread-1252.html <--- Read this aswell if you get time.

Please read the following quotes:

1. What advice would you give to the low/mid to mid demos who are trying to get to the next level?

b4nny: The first thing you should do is ask for constructive criticism from the people you are playing with. I always save a text file full of the advice I receive from others. Some of the advice is very helpful such as: Don't just play waiting around for the other team to make mistakes, try something new and set the pace of the game yourself. Or: Watch STV recordings with a purpose. For example watch your main counter class (scouts) to really learn how they are going to try to get you. Of course you may also receive some advice that is not so helpful, like: Hit all your pipes.

A lot of soldiers out there have decent aim, but seem to lack all sorts of game sense. What is a good way to up your vision and understanding of the game?
Jaeger - A good support soldier needs to learn to manage their health. A rule of thumb for awareness I give a lot of aspiring players is to do a quick 180 and look behind you for a split second, every 2 seconds. This will help you to not be flanked, know when you're over extended and alone, and keep tabs on your team's positioning and status when the comms aren't as good as they should be. Watch demos, watch live match casts, and vods, read articles such as this one, explore the European, Australian, Korean, Brazilian and Japanese scenes to find new insight.

Seagull - Like Jaeger said, an easy way to get some "gamesense" is to see how other TF2 scenes play the game and break it down to see how it works and then incorporate that into your own play. What I did was watch a lot of SourceTVs of my team's matches and look for the round-deciding battles. Finding them was how I improved the most - most of the time, way before the huge intense really close fight that won the round for either team, mistakes were made which caused that situation to happen in the first place. Recognizing those allowed me to find those moments in matches as I was playing, giving me the chance to make big plays when it mattered most.

Seagull - Well, going off of my previous answer, it really comes down to how your team wants to approach the game. If your team chooses to have a pocket&roamer, those two players should play each role to see which they like more. Whichever role the players like more, they should play, regardless of how good each player is at the position to an extent - if x player loves to pocket but he's terrible, the team leader should throw him on roaming and tell him once he's good at pocket he can play it. If both soldiers want to play pocket or roamer and they're both really good at it, then the team should see how they can play off of that and change their style of play to make that work, whether that's a turtle-style team or a suicider-style team. It just comes down to the team playing off of their strengths to have the best performance while still being fun for everyone.

Just this much for now. Later i'll just post more.