Heres another one
In the work shop, if you inadvertently dent a piece of timber your working on, just put a little water on the dent (or spit on it) then leave it, the wood will absorb the water and swell allowing you to sand smooth again, and hey presto the dent is gone.
On a finished piece or a solid wood floor for example, you want to use some fine grit sand paper and just where the dent is rub the varnish down just enough to let moisture get to the wood, then wet some tissue so it is soaking and put the blob of wet tissue on the dent, for about 24 hours, let it dry, and sand smooth if needed, and re varnish.
You would be suprised how well this works even on large dents
