Hand one looks good. You could very easily be against a set or two pair, and still have to worry about whatever he decides to bet on the river.

Hand two, this is weird, but I would bet about $30 to charge a flush draw, stop a bluff on the river, and then take a free showdown. If he goes all-in, then you'll have to make a judgement about the types of hands he would make this play with. I may fold absent a read on his play.