As a med with 4k hrs, exclusively in pubs. I can tell you a few things that help me do my job easier:

Come find me if you need heals. I'm not going to come looking for you (most of the time).
If you're far away and need an arrow, STAY STILL if you see me lining up on you.
PROTECT ME so I can concentrate on healing. If you see me engaged with the enemy, come help.
If we push and I have uber, stay close to your teammates so I can split the uber between everyone.
If you are another medic on the team, please keep me topped off/over-healed. Professional courtesy goes a long way!
Communicate effectively. I'd rather be on a team that communicates good and are skill-wise adequate than a team of amazing players with in-effective or no communication.

You need a med sub your guy is in jail right now

ringme medic

you guys need a ringer i heard something happened to ur player, i can count ubers

You need a med sub your guy is in jail right now

Ｓｔｅｐ Ｏｎｅ． Ｆｏｌｄ ｔｈｅ ｒｏｐｅ ｉｎｔｏ ｔｈｒｅｅ．
Ｓｔｅｐ Ｔｗｏ． Ｗｉｔｈ ｔｈｅ ｓｔｒｉｎｇ ｌｅｆｔ ａｔ ｔｈｅ ｅｎｄ ｗｉｎｄ ｉｔ ｒｏｕｎｄ ｔｈｅ ｔｈｒｅｅｓ． Ｗｈｅｎ ｆｉｎｉｓｈｅｄ ｔｈｅｒｅ ｓｈｏｕｌｄ ｂｅ ｌｏｏｐｓ ａｔ ｂｏｔｈ ｅｎｄｓ．
Ｓｔｅｐ Ｔｈｒｅｅ． Ｐｕｔ ｔｈｅ ｓｔｒｉｎｇ ｗｈｉｃｈ ｈａｓ ｂｅｅｎ ｗｏｕｎｄ ａｒｏｕｎｄ ｔｈｅ ｔｈｒｅｅｓ ｔｈｒｏｕｇｈ ｔｈｅ ｌｏｏｐ ａｔ ｔｈｅ ｅｎｄ．
Ｓｔｅｐ Ｆｏｕｒ． Ｐｕｌｌ ｏｎ ｔｈｅ ｎｏｏｓｅ ａｔ ｔｈｅ ｏｔｈｅｒ ｅｎｄ ｔｏ ｔｉｇｈｔｅｎ ｔｈｅ ｌｏｏｐ．