Sometimes our realities rise or fall meet our expectations of what they will be. If we expect struggle and strife then most often that's what we experience. Try to shift your energy the next time you wake up feeling that way. Focus on a handful of things that are positive and that you aren't dreading. Often that's enough to start to turn things around. Or try to think about it in a different way....be grateful for the work because it means job security or try to find a way to streamline a work process to get more done with less time (this will make you even more valuable to management). With the friend, if conflicts are happening regularly think about spending less time with them. Not to say you'll ever have a "perfect day" but it might be better than it otherwise would have been. Even when you believe there isn't much within your control it helps to reframe the problem.