Create an earthen swell
From there you just need to make sure the water has proper run off and isn't being barred up anywhere.
Lol it's got to be causing problems. It almost looks insloped towards the house?
I would've taken that sidewalk out long ago and made a tread with crushed granite instead.
Anyways, looks like you've got some fun work ahead of you. My #1 suggestion to you would be to go outside when it rains and study what the water does. You can learn a lot from it.