The 'Charlie's Angels' actress became a parent for the first time 10 weeks ago when she gave birth to her daughter Olive and she wants to make sure she gets nothing wrong.
Speaking in the January 2013 issue of Allure magazine, Drew - who is married to art consultant Will Kopelman - explained: "I will always commit. It's like this make-up line [with American retailer Wal-Mart]: I can tell you every single detail about how and why we got here. I want to be that kind of mother. I'm that kind of friend. I'm that kind of producer. I do everything in this life-or-death way.
"The only thing I've tried to get better at is starting to believe maybe it's not life or death. But the [level of] commitment hasn't changed or wavered."
Drew, 37, tied the knot with Will in June and she is so proud to be his wife she even has engraved stationary with her married name on.
She gushed: "I'm a Kopelman now. I have stationery that says 'Drew Barrymore Kopelman'. We have opposite experiences, but we're not opposites.
"We're both very particular and detail-oriented. We love art and music and adventures, and we laugh our asses off together."
Although the screen beauty is losing her baby weight rapidly since giving birth in September, she would rather be a fuller, healthier figure than give up the foods she loves.
She added: "I cannot live a life where I'm deprived. I'd much rather be five, 10 pounds heavier."