Get some bookkeeping software like Quickbooks or the equivalent and start using it.

I like LLCs better for my passive commercial holds only, personally.My reasons for having the mgt corp were for anonymity (it has a very generic name) to pay rents to, credibility (new applicants are more ok giving my corp holding monies), having a 'bad guy' I have to check with for tenant requests, ease of p&l/bookkeeping, 1 place to receive all 1099s for HUD and agency pays, one mileage platform to record on (not every property), retirement account options, a way to obtain health insurance if needed, etc.  

You'll learn timeframes, and costs for specific items, you will learn how to deal with tenants, bookkeeping, etc.

I don't think it is uncommon for owners of PM companies to turn their own properties over to their business and treat them exactly the same as any client property (bookkeeping wise). 

I use both for several clients of mine as I’m a virtual bookkeeper specializing in property accounting.