Saying 'Insha'Allah' (if Allah wills) acknowledges that nothing happens except by Allah's will, as the Quran instructs when speaking of the future; 'Alhamdulillah' (all praise to Allah) expresses gratitude for every blessing. These phrases keep a believer mindful of Allah throughout the day.
References
Quran 18:23-24
Informational, not a personal fatwa. Consult a qualified scholar for rulings on your situation.