This “DVD mentality” is a very common problem in people that does not have a teacher.
The good thing is that you are already on the other side of the problem, because you understood by experience that one-way methods don’t work. This is the first step.
One needs to be supervised to attain something satisfactory on guitar.
This lack of concentration is a result of lack of satisfaction on HOW you are practicing and the results you get. It may be a vicious cycle. That is:
1) You start studying a subject but you get no satisfaction from it because several reasons: a) The most common one: You realized that, after a while, you don’t understand the subject or you need further knowledge and/or practice to grasp it; b) The subject is on a much higher level than the one on which you are; c) It’s not really related to what you are searching for; d) It’s not what you expected.
2) You are not satisfied regarding the first subject so you fly to another one.
3) You repeat steps 1 and 2 continuously, so you fly from one thing to another.
4) You can’t get any better playing (results) because of this wandering all over.
Here are some tips:
1)Work on one topic at a time:
3)Set some goals:
4)Build up Confidence in Yourself:
and most important of all:
6)HAVE FUN! When one has fun practicing it’s very easy to concentrate:
It's better to practice only one thing well than to try to cover many areas and become overwhelmed as a result of that. In fact, the study of technique, rhythm and repertoire should be dynamic and not a static thing.
n fact, if you get absorbed in what you are practicing day by day following properly CFG study program you will get the results you want in a short time.