If going up or down one hook or needle size changes the gauge too much, you could try changing to a different hook or needle material instead.  Different needle materials provide different amounts of friction against the stitches, which can slightly affect your gauge. Metal needles and hooks tend to be more slippery, while many wooden needles and hooks, like bamboo, have more friction.  More friction can make the stitches slightly tighter.   So if your stitches are just slightly too large, but going down a needle or hook size makes them too small, you might try switching to a needle or hook in the same size, but with more surface friction. My Favorite Metal Knitting Needles My Favorite Wooden Knitting Needles My Favorite Metal Crochet Hooks My Favorite Wooden Crochet Hooks