I've sporadically tracked my finances for the past 14 years (started using commercial software on OS X before getting fed up of some of the software and writing

I've sporadically tracked my finances for the past 14 years (started using commercial software on OS X before getting fed up of some of the software and writing my own open source finance app to learn Objective C / Cocoa back in 2009 to do it which I still use), and over the past 6 years have been tracking it rather meticulously, which I find helpful for two reasons: 1. I'm a contractor now, so need to do tax filings, and having detailed finances helps with that. 2. I find it quite interesting (but not always that useful!, although it sometimes is) what my expenditures are each month, i.e. how much I spend on electronics/gear vs holiday vs other, compared to potential savings.