We are big supporters of the ToneRite product at Guitar Gallery. These are great to use on guitars that have sat in the case for a while, and not been played. Put the ToneRite in the strings, turn it on and walk away. Seriously, come back in 4-5 days and your guitar is "awake" again.
It is also helpful with some new guitars, that just seem to be a bit still. The constant vibration of the ToneRite unit, loosens the guitar top up on a molecular level. You can actually hear a difference in the sound. The tone is more robust, the sound louder and more interesting.
We heartily recommend trying a ToneRite on your guitar. You will not regret it!
We offer the ToneRite at $149 with free shipping in the U.S. continental. Here's a quick link for more info: