I am wondering if anyone can help me. What chords sound good ,lets say with a G or a C etc...I know the obvious but how is this figured out. just messing around I find great sounds that seem to stand alone-know what i mean, then i can't really add to them. any help would be appreciated.

                                                                THANKS,
                                                                 wayne

...when you say "...with a G or a C, etc." are you referring to individual notes or chords?

...if you're talking chords, the answer lies in the "harmonized" scale, like this:

C-chord: C, Dm, Em, F, G, Am, Bdim...each of these chords contain "C" notes and "harmonize" with a C-note.
G-chord: G, Am, Bm, C, D, Em, F#m...each of these chords contain "G" notes and "harmonize" with a G-note.

...if you're talking notes, the answer lies in the "Key Signatures" (yes, plural!) the notes could be in; thus, ANY key that contains these notes in its MAJOR (sometimes called IONIAN) scale, will sound good.

Thanks for the reply. I guess for now I am talking chords. Could you give me an example of harmonizing chords that I could practice up and down the neck of my guitar?
                                               thanks again

wayne wrote:

Could you give me an example of harmonizing chords that I could practice up and down the neck of my guitar?

...a "simple" example is the 4-note harmonized C-scale; simply play the C major (Ionian) scale and you'll find there's a "C"-note in EVERY chord, like this:

CM7.....C is ROOT
Dm7....C is dominant 7th (d7 or simply 7)
Em7.....C is augmented 5th (aug5 or #5 or +5)
FM7......C is perfect 5th
G7.......C is perfect 4th
Am7.....C is minor 3rd (min3 or m3)
Bm7-5..C is flatted 2nd (b2 or -2)

...although we began on the G-chord, take a look at GuitarZens' and my postings on how to "make" G-chords; it should help.