What he is saying is to try using the I-IV-V chord progression. Although this uses a lil bit of theory here, it'll help in figuring out this basic progression.
First you need to know about the major scale which is w - w - h - w - w - w - h (the w =whole step or two frets, and the h - half step or one fret).
W W H W W W H
Cmaj = C - D - E - F - G - A - B - C
e |---------10----12--13---|
b |---------10----12--13---|
g |------9--10----12-------|
d |------9--10----12-------|
a |---8-----10----12-------|
e |---8-----10----12-------|
There's the tab and the notes in the Cmaj scale. Next look at each note..
C D E F G A B C
I ii iii IV V vi vii viii
okay i put hte capital letters to show here the 1, 4 and 5 chords are.. those are the ones that are mainly used in those bluesy type progressions that are good to start out on. the Vth chord (g in this case) is also generally made into a G7 which resolves back to the root (C).
okay now if you want to try to figure out what to do for the key of A here's the steps to go about it..
1). W - W - H - W - W - W - H
A B C# D E F# G# A
I IV V
2) you see that A is (I), D is (IV), and E is (V) so you make it an A - D - E7 progression.. That make any sense to you all?