Have fun and enjoy the holiday. This is a very good holiday and does not have anything bad in it.
It is also a good time to contact the gods and to do rituals. You can do the Gods' Rituals. You can do Wealth and Prosperity ritual, Race Awakening, or any other workings that you want. Work on cleaning and improving your psychic senses.
It's not called "Halloween". It's called Samhain. Halloween is it's fake Christian name. That's the name of the ancient Pagan holiday. There's info about holidays on JoS.