Toddler & a Newborn

Mi

My son will 2 years old when his sister is born in Decemeber. I've been reading tons of mommy blogs who have similar age differences in their children and baby items that they absolutely couldn't live without. I have all the big ticket items like crib, double stroller, swing, and car seat. But I am wondering what products/items toddler and infant mommas found to be a life saver.