Cut a piece of sandpaper to fit on the end of a tongue depressor or Popsicle stick and glue it on. Then trim off any excess sandpaper. Let the glue dry and you have a handy little sander for sanding hard-to-reach places.
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Wrap sandpaper around a wood block to sand large areas of wood. The wood will be sanded evenly and the sand paper will wear evenly.
When sanding a piece of wood you can use an old nylon to check the smoothness of the wood. Slip the nylon over you hand and slide your hand over the piece of wood. Anywhere that the nylon snags needs more sanding.