Hi Shelley
I think the recommended advice is too sterlise things like the ice cube trays and spoons that you feed her with and to make sure the bowels and other items you use are clean. However, personally I did do this with dd1 (now 3) and she came down with every bug, cold that she could catch (no immune system), so with dd2 I have not sterlised anything but the bottles, anything that I use for cooking I just make sure are clean and dd2 (nearly 6 months) is fine.
For storage of food either put in freezer bags and label them and put the date on when they were cooked or use some clean storage pots.
Hope this is ok.