Pool Playing Tips

I have been playing pool a long time and some days I play real well and some not.It seems that I can tell right away if I'm seeing the shots well.I don't know what triggers it but it just seems to happen.A person just feels it.My thoughts on this are mixed but I know if I'm not seeing them I might as well look for another day of pool that will produce winning shots and confidence.Oh! on my bad days anyone can beat me and on my good days I play good pool.