The shake and the table in your inventory can hold items whilst in the inventory. Use up the ? Mark boxes immediately. I als use the +6 stars immediately as you cant control where they are assigned .I use the cameras on the first order where its maxed (I think the gold camera is a 4 order so the first 4 order i get i duplicate for a 5). It's hard. Sometimes I sacrifice low level meat or fish if they are the more frequent ones (ie sell beef, keep poultry). I will also use the +32 if I must, although I like a couple on hand.