For me planning is a big part of eating healthy food and keeping to my points. But having the right ingredients handy for when it all goes wrong definitely limits the damage. Here's the first part of my essential ABC:
Asparagus
Aubergines
Broccoli
Basil
Bacon bits
Butternut squash
Chickpeas
Cauliflower
Celeriac
Chicken breasts
Already loads of scope for tasty recipes, and that's just the first three letters.