You could use re-sealable containers instead of bags. Officeworks, of all places, sell a really good pink set, stackable, good size, airtight, 5 for $12.

I don;t go that far ahead, but since little miss, I do prepare vegies at 8am for a 6pm dinner.
I use the resealable containers with the clip on label things. I've found it saves wastage because if they are already prepped then I am less likely to go "well i might just make an easy meal tonight" and forget something cut up.