For the past few months, I have monitoring my spending via the app 'My Wallet'. There is nothing fascinating about this app but it does serves my purpose of spending tracking.
I have heard of other trackers such as 'Mint' etc. But the crust of the matter is, no matter how fancy an app can be, it's the discipline of keying in the spending that counts.
For the last few months, I have pretty much cut down my spending on cab, food at fancy restaurants etc. I also try to stretch every dollars on beauty related products. I didn't become a miser. I still give to charitable cause where necessary.
The last few months, my spending has been hovering around 3k. This month, I shall try my hand at keeping my spending to 2.5k.