I thought I would share this with you guys so you can see how simple it is.
I'm not a big fan of clutter on my altar, and living in a small place has forced me to get creative because I don't have room for a permanent large altar. This is just a big, antique ashtray with two stones representing masculine and feminine, a candle (which sort of doubles as a sort of miniature hearth flame), a stone for air, and a pretty bottle my husband bought me with some water in it. The bottom of the ashtray has sea salt to absorb negativity.
I love altars that are set up on small tray like things. I'm working on one in the bedroom right now, and I'm thinking of setting one up beside the bathtub. A while back I saw an altar set up in what looked like a very small fish bowl. Sometimes you have to get creative and the results can be great.