With the crazy shifts I work, eating at the exact same time is really difficult, but I know how important that is.  I have a "cut-off" time though for sure, whether a regular meal has been eaten or not.
I'm a carboholic (is there a thread for that?) 

  When I do mostly protein in balance with the other stuff, I feel 
so much better, but I get off track easily, cake anyone? 
This lofter can't do high impact.  But the gym is paying off