I'd like to add my welcome as well, John.
As SewerRat said, sanding sticks are the most common way. Another is to just wrap sandpaper around a dowl. Same basic purpose, just gives you some better choice as to the sandpaper grit.
Yet another alternative is the "Swanny Sander". You can find references to it in the "Tools" section of the forum. Take one of the cheap, $5 electric toothbrushes, cut the bristles off, and glue a small, round piece of sandpaper to the head. You can get in to sand places you never though possible before