Chazal (Taanis 8:) say that one can’t daven for two things at once. One should only daven for one thing at a time.
The question is, we daven Shemonah Esrei, which includes so many requests. How do we daven for so many things at the same time?
The Chasam Sofer answers that our request is really just one: to serve Hashem. The rest are details.
We ask for health, parnassah, wisdom, but they are all for the same purpose: To serve Hashem.
~ R’ Elimelech Biderman
Emuna Daily 
I don’t only pray for myself, I pray for others, for the IDF, for the hostages…, in my amidah. Is that also the same as praying to serve Hashem?