May I suggest one shovel full of Portland for every bag of redi-mix. Makes things like they are expected, instead of disappointment from what they are.
Mix well to a peanut butter consistancy and have at it. ( this is the part where Warren says something about Peanut butter )
Take a solid two days to get well set, but it will be as hard as a rock. Water the concrete every hour after it is set, to make it harder.
I'm not sitting around, I am going to move bricks to make a porch.