The Preschool Busy book is a great book. Lots of ideas most are fairly simple.
Best Preschool this is a great site written by Lillian who is on mothering. :)
Preschool express this is another great site. Try checking out the calendars. It gives simple things to do everyday. :)
There is a book called "Look at Me I'm 1,2,3" which goes into quite a bit of child development.
As for you, get some sleep mama! Sleep is a need, not a...