From time to time a particular woodworking tip pops up that is okay, but should really be tempered a bit. It is a suggestion that people use a home-made wood filler. The formulation and application are simple enough: mix glue and saw dust (no shortage of that), make a paste, and use it as a wood filler.
Now, this can work. With a fine saw dust you can make a good paste that is easy to work with and fills holes. It is tough and dries fairly quickly depending on the glue. It even blends quite well, assuming you used the saw dust from the wood you are filling.
The problem comes when the filler is in a visible location on a project that is going to be stained. When the filler is first applied it looks good. However, when it comes time to finish your project you will find that your handy dandy home-made wood filler won't take stain! Just like a run-away glue drip.
So, take heed. The home-made filler is fine on unfinished or painted projects, however, hold off on using it on your fine wood stained pieces.