Well, just like it is good manners to say thank you, please, excuse me and sorry, as part of courtesy, it is courtesy in islam to remember that everything human beings have been given is a favor from Allah and acknowledge that accordingly. Same way with insha Allah, subhan Allah, jazak Allah, astaghferullah, etc.
Interestingly, our ancestors used these words a lot. Similarly, this expression was present in all of our classic urdu literature, and translations of arabic literature (including arabian nights :))
One starts using these words as a courtesy and starts seeing the difference in his life. Doesnt mean muft khora or being hypocritical at all, just acknowledging a basic fact 
Unfortunately, it is our generation that finds itself too cool to use these words (myself included). Whereas the truth of the matter is that in the entire history, there has been no being that has been more cherished, more loved, or more sought after, than Allah. And He introduces himself as a lord of mercy before every surat of Quran. So it makes good sense to attract the mercy and blessings of that kind and merciful Lord by invoking him in all of our conversations.
We have been tricked by shaitan into believing that some matters in life are unrelated to Allah, whereas nothing happens without His will and wisdom. To be honest, nothing happens in life aaccording to our own efforts, everything is a mercy from Allah. There is a famous saying in punjabi that if people were rewarded according to hardwork, the donkey would have been the most deserving as it works the hardest (metaphor for ppl in manual, backbreaking labor) and if people were awarded on strength, only the lion would have been most deserving (metaphor for sharp ppl with great mental or physical strength - the genius, so to say), it is only Allah's mercy that people get what they do, otherwise one's deeds are pretty meaningless. So, like I said before, it is wise to attract Allah's blessings by remembering Him always (in one's heart as well as in conversations), following the ibaadaat, and by doing good deeds towards one's family, the community, and one's work/school (e.g controlling one's anger, avoiding gheebat, lies, bribery; respecting other's rights etc.
I would strongly recommed islamicspirituality.org to all modern men and women. Their 'general talks' section is a true eye opener and a guide. I am not a student there myself, but these talks are very relevant to our times and make a lot of sense.
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