I usually have my first shake at lunch, soup/shake at 5, then last soup/shake around 8pm when I get the kids to bed. Works for me so far as I don't feel hungry when I get up. I know about the health/diet benefits of eating 'breakfast', but I'll do that when I go back to having 'real' food. I get too hungry otherwise.
Weekdays mine are 8am, 1.30pm and 5.30pm. Weekends are a little later but not much. If I don't have my morning one by 10am I get shaky and feel really weak. Hate that feeling. 3-4lts of water in between and a coffee or two.
I divide each pack and spread throughout the day depending how i feel, i mix the vanilla with a little coffee and the strawberry with ice and i've even mixed a little strawberry with the vanilla and ice - not bad. and keep a little bit of vanilla for nitecap.