Why is there never enough?

So I am on "leave" (I have a blackberry which is attached to me so I am never ever really on leave) this week from work and of course that does not mean just sitting around eating Christmas candy all day...today I had my boys (the girls were at the sitter) because my son had 2 doctors appointments and I have taken all 4 before and it was not a good idea.  We left the house at 8am and between the appointments, lunch and running errands to get some items for my daughter's 2nd birthday we ended up back at home at 4pm.  Then I used my Cricut to make a sign for my 12 year old cousins baskbetball game, fed the kids, got them ready and headed out to the basketball game at 6pm.  Then when I got home I gave the baby a bath, asnwered some emails, ate a bowl of cereal, put the kids to bed and now am logging on the computer and my husband starts to complain because we switched sides of the bed a few weeks ago and he decided now he does not like it...all I can do it is think why is there never enough?  Never enough time in the day, never enough energy to get it all done, never enough money so we could afford a bigger house where my husband could have his own room and have whatever side of the bed he wants (LOL), never enough to give as much to everyone else I want to.  Why is there never enough?  Maybe that is not the way to look at it.  Maybe there is more than enough and I just don't use it or value it or cherish it like I should...I guess some days it is just easier to be run down and look at it from the glass half empty perspective and some days it is half full.  Tonight was a half empty night...I am praying for a lot before I go to bed...one thing will be for it to be a half full morning :)  May all of your days be half full days!