50 year fit

I have decided 50 year old people are like 10 year olds and 2 year olds.  We are between stages in life.  I'm not 'young' any more, but I'm not really old either.  It was troubling to realize that I could now qualify for some 'senior' things; that there are vitamins just for my age group...oh boy, I can take classes at the 'senoir' center, I can get discounts at stores.  And, just like a 10 year old and a 2 year, I have a bad attitude.  It seems like we complain about things more often.  I get frustated like 10 and 2's too.  I can't do all the things I did when I was younger, but am still working so don't have all the free time I will have when I retire.  I think this stage is going to last for more than a year. I don't really want to be a different age, but I need to figure out how to make the most of this one.