taking care of business?

I always have mixed feelings whenever i hear ppl say "God will take care of everything". Of course i know God gives us strength, but is it right to rely on Him to the extent that we forget to do our part? I mean ya we could put in our 10% and hope for dear life he will literally fight our battles for us.. but NO! Life isn't like that! .. now why am i rambling on like this? Cuz I hate how i've fallen victim to that phrase most of my life! I've been too passive and too comfortable about life. maybe i've been too high in the clouds to realize the reality of things. i've just been doing a lot of thinking these days.. and its not enough to give even 50% and leave the other half to God! We have to give it our 100% cuz its us and not God who does the work here on earth. I'm not even sure what i'm saying is making sense to you.. but it's crystal clear to me right now. I'm just scared of what will happen if i really do giv it my all in life.. will it turn out to be what i expected?