Hi Scooper,
As previously mentioned detecting right where the home sat is usually a junk fest. As Elton mentioned, span out around the home. When I get to an old house lot, I look for big old trees, rock walls, possibly places where the family garden was, where the clothes line would be, where would of the kid(s) played? Old barn(s) on the property? Where would the horse and buggy of stopped for people to get off? (if we are going back that far in time) etc etc. Humans have always been attracted to water (wells, brooks, ponds etc) check near these areas as well. But check out around the home first. This past summer, I went to an old torn down home site and right where the home sat was total junk chaos.(I was using my 10" DD coil - what a waste of time lol ) As I moved away towards the side and front yard, things quieted down and was able to concentrate on signals. Right across the driveway I found my first large cent (1822) The area where I found the large cent looked to be like an old garden and possibly the area where the clothes line hung as well ( a little past the garden) Hopefully, early next Spring, I can get back and hit the woods right behind this area as it looks to have been cleared at one time. (very small trees) And Terradigger has a good point, using a concentric coil will lessen the amount of item(s) underneath the coil at one time. Away from the home you can obviously use a larger coil but right on the old home site, Something like a little 5" coil (if you can get one or have one for your detector) would be best. Best of luck - Jim