I've always felt a little shaky when giving sacrifices to the gods. (Hellene, BTW.)
I prefer to use things from nature or things I have at home since I don't have the money to buy any special supplies unless they are real cheap. I'd rather give something from my heart rather than "money".
I'm not exactly sure how to give a sacrifice. In my own way, I use my gift of poetry and writing oftentimes. Writing poetry or short stories based on certain myths about the god and offer it up to them. But if I can't write that day, what would be a good sacrifice to give? (Note: can't do food. My mom is not used to my beliefs.)
Well, a sacrifice is a
sacrifice. It's buying things to give even if you can't really afford it. It's going out of your way to give back or to make a good impression. It's giving something up that you want or could use.
My husband gets annoyed that I leave perfectly good food out for the landvaettir, but I do it anyway, and that's a sacrifice. It has unpleasant repercussions but I do it to honor them, and they know that. I buy special foods for them that I don't plan on eating at all, and that's a sacrifice. Poetry and the like are nice gifts, but they aren't sacrifices.