Thanks all, all of those are good advices, and i have been making some progress because of them, thanks. I also mixed some EFT with that
I would say that i do have an overall concentration issue, and to that there are other issues involved.
I have seen that besides not applying all those great suggestions you gave, i had deep issues, intimacy issues as m38967. Its incredible for me to find out that a personal issue can affect us in so many unespected ways.
Listening to people is giving them something from you, you are giving them your time, your effort, your consideration, your respect, and even your support, your recognition to them, could my problem be related to problems about giving?, i have found out that yes, i actually feared connection because of the danger of beign hurt, that is fear of intimacy, your mind tries to disconnect you from everyone else to keep you safe. At least this is what i have found out of myself, so if you happen you have similar problems as i, and beside following the great adivce that all the other people have been giving, i also recommend you to try to use EFT on those deep personal problems, i assure you that in a couple of hours i was actually able to increase my concentration by much, you would have to see it to belive it, the link is at my signature.
Thanks all.