I agree with the above, be open minded, but not so open minded your brain falls out.
I question everything, look for crap argument, lack of proof, and downright lying, all of which are not the sole preserve of the WT.
For example, there are many instances of fraud and witholding the truth even in the Scientific world, just read Ben Goldacre's new book "Bad Pharma", out this week.
I don't actually believe anything, using belief in the sense of trusting that something is true with no proof.
What I trust as true because I am satisfied with the facts that back it up now, may well change in the future, with new facts coming to light,so what ? am I diminished by shedding my former trust/belief ? I don't think so.
Read all you can.
We were the most uneducated people on earth as JW's, rectify that as much as possible and you will feel happy with where you are intellectually, but ignorance breeds superstition and fear, knowledge is freedom.