After scouring several blogs, both theist and atheist, I have come to the conclusion that there is a simple method of telling if your own ideas and beliefs are rational and sane, or off the wall and hatstand. It really is simple.

When you are thinking something, and we will use a theist belief for the example, try replacing words and see if make sense. For example:

God is omnipotent and guides me in all my actions

changes to

C3PO is omnipotent and guides me in all my actions.

If you think the sentence still makes sense, the idea may well be rational. If the changed word would invoke ridicule, then you may want to rethink a little.