Hmmm...I'm jealous that your garden is doing so well.
No idea what to do with sage. But rosemary is great on roasted potatoes and on lamb. You could marinate some lamb chops of kebabs with rosemary, grill them and then sprinkle on more rosemary. Rosemary is also good in baked goods like breads and foccacia. Maybe make a pissadiere (spelling), which is like a Provencal pizza, with olive oil, rosemary, onions and olives. I think Barefoot Contessa had a recipe like that. You might be able to find it on the Food Network website.
I can't even picture sage right now. Is it a soft leaf, like basil? If so, perhaps you could make sage pesto? How to Cook Everything has recipes for all different kinds of pestos.