Give me a lever long enough and a place to stand...
Crib, lever and shim, is what I usually do.
You can also make an "A"(without the horizontal) sling a rope from the apex down under the timber and snug it with the A off vertical. push forward and it'll lift the timber. keep pushing forward and the log moves up and forward. Sling near the center,repeat as necessary, you're "walking the dog"