A need to vent

Why can't i seem to see the smallest detail?? Just when you think that everything you do is right, something will always come up and make everything else look wrong. I am not sure why these things keep on happening. I have not been doing too well the past few weeks. Is it because i am over stressed? Or is it because there is just too much things to do, i tend to miss out simple things?! The pressure is on! No one is perfect as they say but it frustrates me to not notice even the slightest detail when it could have actually been done and corrected the first time!
There is so much i want to change and so little time to do it. I want to improve processes but the load just keeps on increasing. I know i can do it, fitting it in the schedule is the difficult part.
Time management is all it takes.... this is job related... it is frustrating... and i am just venting...