I learned the virtues of a well stocked nail care section of the pharmacy just a few years ago.
Cuticle sticks are a modeler's dream come true, I'd never used them until a couple of years ago, but I wouldn't be without them now.
I use the cheaper wood ones for sculpting Milliput into complex shapes and getting it into tight places.
I've also got a more elaborate one that has a plastic handle and two ends. One end is hard plastic and is flattened to a nice angled edge thats perfect for puting a bit of sandpaper on and smoothing out something in a very small and tight area on a model. The other end has a cylindrical piece of flexible vinyl on it thats cut at an angle and is perfect for manipulating errant bits of uncured paint and glue to where you want them if they got out of hand on you.