As predicable as this answer is, The three card spread is most efficient. Mainly because it can be adapted to pretty much anything. past, present future. you, me, us. conflict, action, outcome. two choices and the guidance. you can really make it fit what ever it is you are reading for. In saying this I will also often create my own spreads, letting my cards guide my hand and their placement. these have always offered the most accurate and in depth reading. however if you are new to doing readings you cannot go wrong with a three card spread, or even a single card draw if your looking for something quick and to the point. I’ll do a single card draw when I’m facing a daunting day, and my deck will give me something to keep in mind throughout the day (This is also a good practice to keep you in tune with your deck if you don’t often have time to do full readings). Hope this helps!