When do we get enough time?

Wow I can never seem to find the time to make a post in this blog. I do not understand how other working mom's can "do it all." I get up in the morning get ready for work (thankfully have a wonderful husband who takes care of my son in the morning), go to work, work all day, pick up my son, eat dinner, play with my son, give him a bath and then read him books and put him to bed around 8:15. Then I have to straighten up, feed the pets, do the dishes (no dishwasher) and think of what else has to be done. By then it's almost 9 pm and I am ready for bed. Most nights I forget what I have been thinking about doing all day long. On those nights where I do have a little energy left I can sometimes manage to organize laundry or go thru my mail. Even tonight I know I have a ton to do but I am so worn out from my day I just decided to surf the internet for a little while before I go to bed. When did I become such a poor manager of my own time? Yes I know I have an almost two year old but still. I look around and see all these other mommies out there doing it and they never seem worse for wear. What is their secret? Even when my son is doing something so simple like watching the Wiggles on t.v. I am still right beside him watching and singing right along with him. I love those moments. I love spending time with him and watching him develop and grow, knowing that I am a huge part of that. I guess I really just need to try and accept that my time is not my own these days. I'm sure someday it will be okay and I will be thinking back to these moments and wishing I could re-live them again.