Well, yoga is really reorganising my day, but it does that in a gentle, spontaneous way, not with rules that I suddenly decide to strictly follow.
The rule about not eating before and after practice is just too much strain for my current life, so I decided to simply not care about. What happened, however, is that I tend spontaneously not to eat at all before practice, and possibly not to eat just after, which after all is in line with the rule.
The same apply to the rule that you should empty the bowels before practices. In some days, this would mean skipping practices. In the beginning I was tryng to follow this rule but as I realized that emptying the bowels had become more important than practice itself, I just skipped the rule. Again, after some time empting the bowels in the morning became very easy.
That's just some examples on the body level, but there a lots of examples on more subtle levels such as yamas and nyamas where I found that good things happen almost spontaneously, no need to strain in order to strictly follow rules. To me, it seems that those changes come from the inside, and this is a new aspect im my life.