So, with the best of planning and intentions sometimes you pass your limits a bit in training. I usually figure it out as I'm walking towards the changing-room. Its obviously too late to change what you did, but maybe is there something that you can stuff in your mouth to ameliorate effects? I always try and eat something carbohydrate, something protein and something that came from a plant after every workout, but maybe is there something specific to do to help things along? There are maybe three different sub-situations that I've noticed:
Too intense/long cardio: Trying to do a distance that I can do in 50 minutes in 40 minutes or completing a distance goal even though something went wrong and it's taking waaaay too long. You end up feeling kind of cold and shakey, and know that the next day or two you'll be lacking zip.
Too difficult a strength progression or deep a stretch session: Not an injury, just a thorough use of some muscle that leaves a sort of warmth and feeling of complete utilization in the muscle belly, but you know that it will be 3-4 days before said muscle gets over the DOMS, which is unfortunate if you have something you want to do in two day's time
Too much done in total: A few late nights trying to get the paperwork done, a few crazy days trying to do some extra stuff around the house, and you keep up a regular training routine. Suddenly you feel as athletic as a depressed banana slug