[AAismyfriend]

There is nothing you can do in hand 1 really. It is merely bad luck he happened to have a set, but you lose a ton of value by checking this river, and if you are checking the river it should be to c/f not to c/c.

Hand 2 is trickier and comes down to reads and your own table image. I would shove the river for value vs most given how this hand played out, since most people will not slowplay a set on this board, but c/fing the river here is probably ok, since the only hands he can be bluffing with are J9,Q9, and maybe 55.