Conservatism is not a strict set of rules. There's no book locked away someplace, listing what is conservative and what isn't. There's no judge with the responsibility of taking away your conservative credentials if you believe in abortion, or gun control, or if you agree with something that a liberal (or Liberal) government says or does.
A real conservative doesn't form an opinion based on some imaginary "conservative way". A real conservative makes decisions based on what seems sensible and what seems right to him or her. But of course what seems sensible and right to one person, is more than likely going to seem sensible and right to many many other people.
And so my very loose definition of conservatism is "what seems sensible and what seems right".