how to prepare for taxes? 2 properties, 4 units

[Brad Penley]

Seasoned pros,

I have 2 properties with duplexes on each (4 total doors). I am living in one unit in florida and renting out the rest. In the past I have just used an excel spreadsheet and annotated the rental income per month and the expenses per month. But now that I'm starting to get more properties is there a better way to do this, or should I just keep it simple and keep doing what I'm doing? Thanks for any help!