You can add small beads to the floss as you wrap if you want. Or add charms with jump rings when you're finished - attaching them this way will allow them to move around. Otherwise you can use the floss tails to add charms or buttons.
If you don't use the floss tails, trim them and add a touch of jewelry glue.
You can seal the whole bracelet with Mod Podge, too. You'll lose the soft feel of the bracelet, but you'll increase its durability.