Tilen,
Go to this page: ww w.pbguitarstudio.com/GuitarLessonPDF.html
(I don't know how to put a full link in here. It says too many links, 0 links allowed)

Download this PDF:
5 Position (CAGED) System - LARGE (Print out a few copies)

Find this in the upper-left corner: "Major Scale Pos 1"
The circled "1" is your tonic or your root note. For example, in this case, let's say it's in the key of G.

1 = G
2 = A
3 = B
5 = D
6 = E

In the same PDF file, go down to "Natural Minor Pos 1".

1 = G
b3 = B(flat)
4 = C
5 = D
b7 = F

Pentatonic or Pent means 5.
Note that the next 1 is not counted as 8, as it is G again (Octave).

You HAVE to learn every note on the guitar fingerboard. Period. No ifs, ands, or buts. Period.

There's a lot of work to do, but it is quite satisfying in doing so.
I'm sure someone will come along and expand on this and talk about learning elementary theory, etc.
Ask more questions if you need to.

Mixing it up a little here:

He's only been playing for almost 55 yrs.

Great video uderoche! Shred Durst was making me LMFAO!! He explained vibrato very well and the people a person can emulate and also who not to.
@Nich: I saw the Fred Durst solo while looking for a vid of Zakk Wylde dissing Durst. I was thinking to myself, WTF!? Is that for real???
I didn't realize this thread could be so entertaining.

If I could play like this, I would be smiling also. Incredible phrasing. Like Pebber said, solo like it's a horn.
Al Di Meola 1991 Kiss My Axe Live
http://www.youtube.com/watch?v=bgaRjKe2Hkg