i agree with the information in Bobbi's book about the makeup EXCEPT the burhses. I feel that you need to clean them more often then she listed. I wash my brushes every night, but that is just because I use it on other people's faces most of the time. So even when I do my makeup I am in that habit.
Here are some makeup maintenance tips that I use. I ususally use mild shampoo and sometimes I put a little conditioner on it to keep it pliable......if you have good brushes then they are made out of natural hair, and the conditioner keeps it flexible which will ensure better blending.
Now about the mascara....you should dump it after 3 months OR if you have a cold. When you are sick your body dumps toxins out of your body through your tears too....and you can get it in your mascara. So if you dump it when you are sick you keep it from getting germs in your mascara that can cause you to get eith pink eye or an infection that can even cause you to loose your eye.
With "powder products" like eyeshadow....you can enlongate it's life span by taking off the top layer with a tissue. Some makeup artists scrap the top of their powder products with a makeup spatula. I usually cut some of the lipstick off, and put in in a lipstick case and work from that, instead of the tube. But to lengthen the life of my lipstick (an keep germs at bay) I usually use a lipbrush, and get a good amount on my brush before I use it so I don't have to "double dip"....but then I occassionally spray my lipsticks with alcohol and wipe them "just in case".
Makeup & Hair Artistwww.candacecorey.com/makeupworkshop