1. Create a paper system
Paper is one of the hardest things to handle. There is so much of it and it goes in so many different places. The mail, pay stubs, receipts, notices from school, craft projects and the lists goes on. I wrote about how I handle paper here. Find a system that works for you and that is easy to maintain, (or we all know that it will just become piles and still be unorganized.
2. Create a cleaning system
We do the dishes before bed. I clean the cooking dishes as I cook (as much as possible), we sweep daily, we mop 2-4x's per week and hand spot as needed. We constantly pick up after our toddler, (which is always a loosing battle), and I deep clean everything once per week. Find something that works for you, and stick with it.
3. Follow the KISS method
My husband loves this method, KISS stands for Keep It Simple Stupid. Each home will needs systems, and ways to keep order in your home. Above I simply laid out two types of systems that we have in our home (there are many more) and your home may need different systems than ours. The hole point of systems is to make your life easier, so don't make them super complicated. Keep them simple and easy to follow and maintain.
There are many different strategies that you can use, several people like Home Management Binders, but there are many different types of systems and ways to keep track of them. The main point is, find a way to manage your home to keep it functional.