i usually use an insert on my kick so i can shape it to suit the kick and the kick only. i'll duplicate the kick and add reverb at 100% mix to one channel but leave it off the other. thus i have more control over the mix. also a high pass filter on the verb is essential as it can get very very muddy down there.
also use your very best verb on the kick as it really brings out the overall low end feel of the track.