Do you write off every expense you can? Many people don't because they think it's too difficult. Trust me, it's easier than you think.
I created a list of categories that I spend money on for my business. These are things like listing supplies (signs, lock boxes, flyer boxes, etc.), advertising (virtual tours, flyers, etc.), office supplies (paper, pens, ink cartridges, etc.). I have about 14 different categories. Talk to your accountant about what kind of things you can write off.
I then created an Excel spreadsheet that I use to track each expense. I sort them by date and category, and then assign a number to each receipt (that allows me to find it easily if I need it). I can tell at a glance how much I spent on each category by month, or for the entire year. Keep every receipt. If the receipt was printed on a thermo printer, make a photocopy of if (they tend to fade over time), and staple the original to the copy. File them in a cabinet.
My accountant loves me. He has told me that he loves doing my returns since his work in minimal with all the "pre-work" I have done. It's not hard, nor is it a task. It's a business decision and a mind set that saves me alot of money each year.