Today I read something on facebook that just clicked:
"Being consistent with your workout is easier if you feel good."
Now I'm not sure about you, but this totally rings clear for me. It really is hard for me to even get motivated to work out if I just don't 'feel it.' The answer...MUSIC. I mean look around you, its everywhere. And its that one thing that can take you from a shitty ass day into all smiles. Use music to pump you up and get motivated. I know I do. Trust me. You could be tired as hell, but even listening to a fun, dance song will get you feeling good.