Read up on Berardi's stuff, and strongly consider his "Precision Nutrition" program. It's worth it... you'll thank yourself later for the investment.
To your question: yes, it's easier to cook a few meals at once and divide it up. I usually cook once a day - at night... make my dinner x3, eat a third, and put two portions in tupperware for the next day.
Also have a few "quick meals" ready in case you're in a pinch. Grow! shakes are always good but I personally don't find shakes very filling. Try:
1/4 cup ricotta cheese -OR- 1 cup cottage cheese,
1 tspn olive oil,
2 tbsn milled flax seeds or chopped nuts
2 scoops Grow!
1/2 cup-1 cup water to make a pudding
Great P+F meal, takes 5 minutes to make and 5 minutes to eat. Delicious too...
Berardi has a lot of good meal options you can make "in bulk" in his Gourmet Nutrition e-book (inculded in the Precision Nutrition package).