To protection spells binding spells. Channel energy, or cast a circle. My simple was to cast a circle is this: go find a natural ground plain valley forest etc. or if you own a ranch with a lot of land that will do. You can do this at day or night. Before you do this meditate if you want o calm your nerves. Go out side under sunlight or moonlight if it's night. Walk around in a huge circle (14 ft at the least), while doing this pointe your finger at the ground,and visualize a white light piercing the ground and making a circle. Also channel energy out of your finger at the ground as you walk. Then go to the four ends of the circle and visualize smaller circles big enough in size to put a baseball in it (you won't need a baseball don't worry it's just an example). Also channel energy as you do this. Then the four ends I'll tell you what to say.
First circle at the end: oh air I call thee to my circle for my summons
Second end: water I call to thee to come to my circle for my summons
Third end: fire I call to thee come to my circle for my summons
Fourth end: earth I call to thee come to my circle for my summons
Then in the middle say: element spirit I call to thee come to my circle for my summons
Then stand in the middle and say: all five elements I call to thee answer my summons so mote it be.
Then ask the entity for their help.
This was a circle for summoning. You can change it for invoking or anything along those lines.
Hope this helps!