Make room inside or outside the house where you can be by yourself or only be together with others who join in your magick (so close the door, put the phone off the hook, make sure the children don't come in, etc).
Ofcourse a place in nature, near a rock, a stream or lake, or under an old tree would be ideal to feel a strong connection with the forces of nature. But in this crowded world it is quite difficult to find such a place and be there alone.
Therefore you might consider to create yourself a private corner in your house, a small table, a bookshelf, whatever, some place where it feels good to do your magick. Most probably at the same time this will become your meditation place. As Joseph Campbell states:
"Your sacred space is where you can find yourself again and again."
Decorate your sacred space the way you want it. You can make a small altar or keep it quite simple: maybe with just a collection of spiritual books, tarot cards and a candle.
If you choose to make an altar you can use for instance a small table with a beautiful cloth over it, and place some of the following items on it:
candles
pictures or statues of the gods and goddesses of any religion(s) you feel connected to
an incense-burner or burner for essential oils
crystals and gemstones
fresh flowers
offerings you wish to make, like fruits, things you bake, art you make
whatever ritual tools that appeal to you, like a ritual sword, ritual knife, cup
ritual musical instruments, like a tibetan bowl, shamanic drum, didgeridoo
symbols, like a pentacle, yin/yang, pyramid
your divination tools like tarot cards or runes
and anything else that has a special meaning to you, like your favourite teddy bear, things you find in nature (pieces of wood, shells) or the chain your deceased grandmother gave you You might wish to decorate the wall with a mandala, a picture of dolphins, a rainbow, beautiful nature scenery, celestial globes, an inspirational text or a symbol. Maybe you even want to add a cd-player for meditation music.
If your sacred space is in a nature scenery it is practical to keep it simple; stick to a cloth to sit on, some candles, incense and maybe a ritual tool.