Whenever we take time off from training and rest, many of us feel guilty, including myself. It's been programmed in our lives to be on the go, to always be doing something productive, and make the most out of each day. I think we all forget that sometimes making the most of the day, is to actually doing NOTHING.
By doing nothing (in terms of training), and just relaxing and eating good food, we recover and refuel our body efficiently. When we recover properly, we end up being able to train harder, better, and faster, for the next time! Therefore, be happy on your NOTHING days, they're actually more productive than you think.
...so relax, and rest up! ;)