Macro'ing HS to other abilities can lead to long streaks of no rage. It's usually a better idea to just use the ability separately.
For tanking I use Revenge+HS and Devastate+HS macros. With the Glyph of Revenge, this changes the rage generation quite a bit and I was wondering, should I continue to use the standard rotation or another one?
Bind HS to your mouse wheel or another key that is easily spammable.
As Dreador said, too easy to rage starve yourself. On Rotface last night (for example), I had to drop HS from rotation for long periods of time because the rage intake was far too low. If I had to switch keys to do that, well it just seems like a waste.
RNGesus - Saving you unreliably since BC.
Or you can use a toolbar mod like Dominos and set up two identical bars - one with HS macros and one without. Then, when you want them, you shift-mousewheel to swap the new bar in. Its quick and saves you from some of the spamspamspam monotony of HS.