• You can read a good spiritual book such as one that I've reviewed here
• You can study the Bible, Torah, Upanishads, the Bhagavad Gita, or other scripture and try to find the spiritual truths hidden within them
• You can develop or test your psychic abilities by trying to guess what card you will draw from a deck  and keeping track of how successful you are (note:  If you draw 40 or 50 cards and don't get any right, that doesn't mean you have no psychic power, but you may have a kind of reverse psychic power causing you to guess wrong all the time)
• You can try telling the fortune of yourself or others with a tarot deck
• You can pray for those who are sick, having money problems or other kinds of bad luck (Yes, it does help you  to pray for others)
• Practice visualizing your energy centers and see them full of Light or spiritual fire.
• Get out that DVD or book on yoga or tai chi that you got, but never opened, and start doing the exercises

Those are just a few examples, I'm sure you can think of others.  And don't forget to check on elderly neighbors who may need help.