What is the normal thing to send to a young man entering Turkýsh military.  "Kendine bak"?

The most common phrase is "Hayýrlý tezkereler" which literally means "good discharge papers" but it is said for wishing good luck to the soldier who will get his discharge papers after his duty. But they say it before for wishing luck for his duty, serving without any problem. And also you may say "Allah yardýmcýn olsun" (may God help you), or "Hayýrlýsý olsun" (hope the best).

Thank you.