Homebrew PCBs

The two best solvents that I use to remove the toner from etched 
boards are:

1.  Energine Spot Remover (A dry-cleaning fluid)

and 

2.  Goof Off (A paint remover)

Both are availible at hardware stores.

My preference is the Energine Spot Remover as it works INSTANTLY.  
Like the others have posted, wet a portion of paper towel with the 
solvent and gently rub the toner.  It will immediately dissolve the 
toner (in a single pass).  I like this solvent best because it dries 
cleanly and almost instantly.  The Goof Off is almost as effective, 
but it may take more than one swipe with the paper towel and it 
doesn't dry as quickly.

Just my $0.02

John