You know you're tired when...

...you realize you got up earlier than you needed and once realizing that seriously consider going back to bed for a while.

I thought that not once but quite a few times!  I even considered going back to bed and blowing off the entire days activities.  As it is I'm only doing 10 miles because I'm going to a horse show.  I've done long miles and a horse show before but I've been tired since I missed my nap on Thurs.  and think it's in my best interest not to be completely drained before I jump my unpredictable horse.  There is another show in 2 weeks and I'm not going to go!

Crap - the dog's barking - got to go let her in!