Well, I believe someone summarized my sentiments on the matter of religions long ago.
Do not believe in anything simply because you have heard it.
Do not believe in anything simply because it is spoken and rumored by many.
Do not believe in anything simply because it is found written in your religious books.
Do not believe in anything merely on the authority of your teachers and elders.
Do not believe in traditions because they have been handed down for many generations.
But after observation and analysis, when you find that anything agrees with reason and is conducive to the good and benefit of one and all, then accept it and live up to it.
It's been surprising to notice that I'm pretty close to being a Buddhist without knowing...

So. Do I believe that Jesus' teaching about doing unto others as you would prefer done to you? Yes, because it agrees with reason.
Do I believe that God was involved in conception and life and death of Jesus? No. It's possible, but unlikely and unproven and I don't have any reason to believe that, I can respect and agree with Jesis' basic idea of making nice with people even without thinking that God had to be involved.
Do I believe everything else in the Bible because it's in the Bible? No, not as such; if it makes sense to me I don't specifically need to believe in it to agree with it. And for example the concept of original sin, and God as he's portrayed in the Bible, largely does not agree with reason and more importantly, it is on many occasion not conductive to the good and benefit of one and all. Even if Bible would tell it is, I can not agree with that point of view on various things. The mechanisms for salvation are the one of the biggest thing I disagree with on the Bible; I can not believe that God would place such inordinate amount of attention and importance on our faith and I disagree with the basic concept of being "sinful" by default simply as a consequence of something a supposed ancestor did. These things do not agree with my reason.
Always, always consider the source. As soon as something tells you that it can't be wrong, you should have warning bells ringing in your head immediately. Especially when it comes to non-falsifiable claims.
Ironically, I'm quite certain that if God
does exist and there's some kind of afterlife, he would be quite understanding of this kind of view of world rather than judgemental, jealous personality that he is portrayed in Christianity. Personally I think that even if God exists, it's not him that would be jealous, but the priests and clergymen that have taken over the basic idea of religions and converted them into their personal tools of controlling people. Not every one of them, but enough that I have no reason to believe in any established religion, I rather make my own mind about things like this and take my chances with my
own opinion than put all my chips for
someone else's opinion because it's what I've been told from child, one religion of the hundreds available.
If I'm wrong, at least it's
my mistake and not someone else's.
After all, this might be what happens just as well as any other option. 
So I could say that I have more trust even in the possibility of God than I have faith (nevermind trust) in the traditional portrayal of God in christianity and other major religions.
EDIT: Of course quoting Buddha is dangerous business because probably a lot more has been lost in translation than with Jeshua of Nazareth, but regardless that quote makes a lot more sense to me than Bible as a whole... as do other quotes supposedly from this person.