how to keep track of net worth

[Dustan Marshall]

After reading many books on personal finance, a common recommendation is to keep track of your net worth. I like the idea of this.  For me, RE investing is about CASH FLOW to grow and sustain the business and NET WORTH for purchasing power in retirement.   As such, I have set goals both in cash flow and net worth.  But how do you all track your net worth.  I tried using excel, but I feel like it gets cumbersome with the incomes, depreciation, asset values... etc involved with owning RE.  Is there something cleaner that is good for a monthly summary or do I just need to stick it out with excel?