Generally speaking, I think you will find a more accurate indication of direction by seeking the null rather than the peak signal. As alluded to by another poster, the answer is completely dependent upon characteristics of the signal you are transmitting.
A coil of appropriate diameter relative to wavelength, consisting of several turns of wire makes for a good, simple way of finding a null point and the transmitted will be along the plane of the coil.. OK, so that narrows it down to x degrees or x+180 degrees. But you get the idea.
There are 'dish pointing' gadgets on eBay for around $8 that help aim the kinds of dishes used for DirecTv and Dish Network. Maybe buy one and look inside? For that price they can't be very complex.