We have sold our home and moved 7 times in 14 years almost all with young children. There is a lot you can do, but I won't make it long...
Firstly, resign yourself to the fact that selling your home will be the focus of your family for however long it takes to sell....It truly beomes a full time job.
Keep in mind that first impressions of your home are lasting impressions and you never get another chance to make a first impression...
(not to add to any more pressure!

)
It is hard keeping up a nice show appearance, but it will definately help in selling your home.
These are just a few tips with young children:
*figure out a good organizing system..."a place for everything and everything in it's place"...this way, it is a no brainer where things go. You are on autopilot and you don't have to think about it.
*If your little ones are in school, get a rubbermaid container for their artworks, projects etc. for each of them. Sad as it may be, don't display work at home for now.
*...A hard one...pack away half of thier toys and games and DVDs etc...
This makes less clutter and easier clean up. Then when you sell your house, and take them back out again, it is like Christmas all over again....it is so exciting to see how excited they get!
*Again, use rubbermaid, etc. containers one each for different groupings of toys (Power Rangers, Dinosaurs, Legos, Little Ponies, Littlest Pet Shop, etc.)
*Have the kids help clean up...make it a family project to sell the home.
*Assign special towel for each child and have them use and hang right away and reuse for several baths/showers if hung dry properly. Cuts down on wash...Go to a J&J "Head to Toe" shampoo/body wash to eliminate number of bottles in shower/Tub area. Can apply same concept to adults.
*Use paper plates/cups for meals
*If you have a good support system, ask if you can have kids play over more at friends/relatives homes until your home sells and then return the favor (if in the same area) to try to keep your home in order.
* If you know you will have a home showing early in the morning, eg on a Sat., instead of everyone scrambling to make beds early, etc. have kids have a "sleepover" in your room with a sleeping bag and pillow so beds stay neat and it's just a quick roll up of a sleeping bag and pillow.
I could go on forver...we did so much to keep up with it!
The most important thing is to have fun with it and make memories, even though it is a stressful time!
Like I said, I've done it quite a few times, let me know if you have any other questions....
Good luck!