best way to use a package from unstable in stable...

[JBaczynski]

I am running 3.1 stable & logrotate 3.7-5 as included with stable.  Unstable now has 3.7.1-1 which has some date logic in it that I really want.  The package has dependencies that aren't included in stable.  Is there a recommended way that I can get the newer version of the package into my server without breaking things or should I avoid this kind of mixing altogether?  Any suggestions or ideas would be appreciated.   Thanks   Jason