how can i set the d70s up for sharp distant photos useing 18 -70 mm lens

i am going from ps to dslr

The best thing to do to get sharp photos would be to first use a tripod, which would give you a shaper image. If the camera is held still, then there isn't really a way to make the distance photos sharper. If you are shooting something moving, or something that you want to focus on (for example a tree instead of mountains) try shooting with the object in the middle of the red square seen through the viewfinder. The last thing you could do to get a sharper image is just buy a zoom lens that's larger than 70mm. If the objects you're taking aren't moving then you don't need a low f stop value and can get a relatively high zoom lens for a very cheap price. If the objects are moving, you'll want a lower f stop value (3.5 for sports, 4.0 for slow moving wildlife), but it will cost you more. If you have any other questions about lenses, camera bodies, or just photography in general, feel free to ask.

what setting should the camera be set at ,say for sharp lanscape shots