What is another word for putting one heart and soul into it?
Pronunciation: [pˈʊtɪŋ wˈɒn hˈɑːt and sˈə͡ʊl ˌɪntʊ ɪt] (IPA) 
There are numerous synonyms for the phrase "putting one heart and soul into it." One could say that they are "pouring their passion" or "laying their emotions on the line." Others might use phrases like "giving it everything they've got" or "throwing themselves into the mix." Additionally, one could say that they are "fully committed" or "wholeheartedly invested" in a project or activity. Whatever the phrasing, the sentiment remains the same: when someone puts their heart and soul into something, they are fully engaged and dedicated to achieving the best possible outcome.
