I'll be the first to admit, some days it is just harder to attack the work with my best. It could be that I don't feel well or I am frustrated by something or someone or I am just out of sorts. On these days, I have to be extra sensitive to where my mind goes as it is very easy to become negative.
When any of us become negative in our thoughts, problems seem to compound. We start taking things personally, we are incapable of doing our best work and we often become more and more negative. When one thing goes wrong, we start seeing more and more things go wrong. When this happens, we have to instantly recognize it and work to pull ourselves out of this negative mindset.
Each person has their own ways of trying to eliminate the negativity as they feel it creep steadily in. Some people will meditate, some people exercise, some people just move around for a while, some people do breathing exercises, some people find ways to laugh and some people will do any number of other things. What works for you when you start to feel the negativity taking hold?