Here are my healthy eating grocery basics... admittedly, not always the most budget friendly, but quick and easy healthy options.
Bagged salad mixes (especially the kinds with baby spinach)
baby carrots
grape tomatoes (wash and then they are ready to grab!)
ready-to-steam bagged fresh veggies
All natural lunch meats (not from the deli... too many nitrites there). I usually buy the Hormel All Natural Honey Ham and Smoked Turkey
Laughing Cow light cheese wedges
Rachel's brand single serving low fat cottage cheese (the pear mangosteen is delicious!)
Light cheese sticks
Arnold Sandwich Thins or Pepperidge Farms Deli Thins (sandwich rolls)
apples and grapes
snack size boxes of raisins or craisins or both
instant high fiber oatmeal
high fiber cereal (like FiberOne or Crunchy Corn bran)
Stonyfield Farms fat free french vanilla yogurt
Skinny Cow ice cream cones (not so healthy, but a great treat!)
Rotisserie chicken (easy to cut up into individual portions and have ready to grab from the fridge for the week!)
Eggs (I eat only the whites but I prefer plain whites to the taste of Egg Beaters)
I guess those are most of my quick and easy healthy staples.
If you are up for just a bit of cooking you could make things up on the weekends or evenings to put in the fridge/freezer and have to grab. Homemade healthy, high fiber muffins and breads are great for breakfast or snack.... Pumpkin muffins with carrot and raisin is my favorite right now. I also make apple muffins. I add LOTS of grated carrot and chopped apples to most of my muffin recipes to make them a bit more filling. But homemade if you are trying to watch your calories... most store bought muffins (and Dunkin Donuts muffins) are LOADED with calories!!
You could cook up chicken breast on the weekends and portion it into Tupperware for the week. Then use it in salads, or with rice or a hot veggie. If you have a microwave where you eat, you could micro-steam veggies to go along with the chicken for lunch/dinner.
How about soups? Find some good lentil soup, pea soup, and/or bean soup recipes, stew recipes, and chili recipes, make up a big batch, and then portion it and freeze into single servings. You could pull one serving out the night before and then it would be defrosted and ready to heat quickly the next day. A piece of cheese and maybe a few crackers or melba toast rounds and you are good to go!
In a pinch, there are a few decent frozen meals out there.... but you need to read the package if you are trying to avoid things like MSG, sodium, and preservatives. But having a few of those on hand for emergencies might help.
Good luck.......................P