It depends on what I need to concentrate on.

When I was doing homework, silence helped me focus on the task, but sometimes made me feel tired (cause... homework was boring!). So then I would turn on music, which would wake me up, yet not become too big of a distraction for my work... Unless of course, certain songs pop on, haha.

When it comes to concentrating on a game or competition, it helps if I just not listen to anything around me; just completely ignore my surroundings and just focus on whatever is one screen. I ended up irritating my family a lot when I went into those sorts of trances, and not JUST because I was ignoring them; Whenever I was taken out of those trances by force (a hand on the shoulder, blocking the tv, constant shouting) I would become very irritated and shouting. I remember once I was playing an online game and was defending our base when a small knock on the door happened... and I shouted out of no where, "BUSY GO AWAY!"

Concentrating on an e-mail or... a post... I have to ignore things around me. If I hear my family bustling about, I close the door, turn the television on, whatever I need in order to get all my thoughts out. Unfortunately, that sometimes causes my writings to become disorganized because I am trying to type as fast as I can think of what I want to say.

When it comes to concentrating on sleeping, because yes, that takes some effort for me sometimes, I need distractions. Television or a youtube playlist being streamed usually works best for me. If I try to sleep in silence, either my mind wanders to things I rather not think about or I hear things going on around the house and just cannot sleep.

Until my sophomore year in high school I had a very hard time concentrating on many tasks. I found that if I listen to music while I read, or perform any tasks that requires focus and attention, that I will retain more information and have a better comprehension of what I have read. I also find that listening to music helps with multi tasking. I think it allows my unofficial ADD to focus on the music while I focus on the tasks I am working on.  

I don't really do anything special to concentrate because I don't need to when I need to concentrate I concentrate its that simple

I listen to music to help me concentrate.  It helps me focus and get in my zone.

I actually hardly ever concentrate, I don't know how, really.

I just look everywhere instead of concentrating.

But I feel if I need a little more focus, the Red Bull energy drink tends to help me out.

I cannot concentrate in complete silence, but I also need something that doesn't dominate my attention, so I usually put on a funny movie or episodes of a show I've seen so many times that I know every piece of dialogue; otherwise I would keep stopping what I was doing and just watch it so I could tell what was going on.

Just the other day I was writing a paper for a class and I wound up listening to every episode of Clerks: The Animated Series. Granted it only lasted for six episodes, but I still feel like that was a lot of time to spend that way...

I go to an entertaining website that can be considered innappropriate and stay there for an hour or so until I am fully relaxed and then I go back to whatever I needed to concentrate on.

Other than that, a little bit of fire water might do it, just enough to wipe away my wandering mind and not enough to make me all goofy.

What is this "concentrate"? A new form of candy?

*laughs* What is this concentrate of which you speak?  Some new sports drink or something? :p.  Suffer from STS...Shiny things OH SQUIRREL! *Chases after squirrel *

To concentrate, i close my eyes and/or cover my ears, and hum quietly, blocking out other noise. It works pretty well.