This is a great topic. We all have bad days. As Javier stated, if this is a reoccurring issue for you then you should evaluate your life outside of training (ie. recovery, stress and habits).
You mentioned you trained in the morning. Personally, I don't like to train in the morning unless I have to. I feel lethargic and slow. So I avoid it. Find what works best for you in this case.
Personally, I believe if you have a bad day, you should focus and fight through. Since, the snatch is the more elusive of the movements, this will require the most amount of focus, tension and awareness. Or maybe for you it's the C&J. It's individualized in this case. And then you have the squats, pulls and the like. This is where you have no excuses. If you are having a horrible day, this is where you make up for it.
Having trouble with 295# for triples? There are ladies warming up with that weight somewhere in the world right now, so sack up Sally. This is weightlifting. This is part of what makes it so challenging, yet fun. So don't be so down on yourself, everyday will be different, and it's part of the journey.