This question comes up so often (as it should) so here are some hints that will hopefully help!
*First I want to say that the same color on everyone from head to toe does not make for the most visually appealing image. Think coordinating, not matching when you are styling your family.*Choose items with good color, textures (i.e. ruffles, knits, denim) and don't forget the accessories (bracelets, necklaces, scarfs, heels, ties, hats, leg warmers, etc.!).
*So we all know it can sometimes be more difficult to either dress mom or the female in the photo, right? We have so many more options then men! So I say dress the female first THEN coordinate whoever else will be in the photos off of that chosen outfit. Printed dresses and tops and always visually appealing!
*Since you may have up to three clothing changes in my full session. Try doing a nicer outfit (casual dress, button down, etc. but please NOT formal, that is not my style) and then one more casual fun outfit.
*Browse your favorite stores online and typically you can see coordinating outfit ideas that look great together.
Here >>>>>>> http://pinterest.com/mattiekphotos/what-to-wear/