Yep, and protein powders, greek yogurt, cottage cheese, trail mix. Once you do it for a couple weeks you will not find it hard to get it all in anymore! Don't buy fat free, sugar free stuff. Get the real thing to bump up calories, plus they are better for your metabolism. I'm sure you can look at most people's diaries on this group and get ideas there. Good luck!

I changed all of my low-fat items/diet foods to the real thing-- that helped a lot. On top of it, more protein powders, avacados, chicken breast (I was only eating Tuna before,) wraps and good cheeses like Feta and Provolone.

I've gone over my fats most days, but it's still a work in progress.

Any kinds of nuts will help you increase your calories. Low-fat cottage cheese is also a great choice.

I make homemade granola (to keep the sugar and sodium in check) and that always helps increase my calories. Also, if you can, make your own salad dressing. They're really easy to make and those can add good calories to your daily diet (and also helps you control the sugar and salt content).

Try adding ground flax seed to....well, just about anything! It provides a good helping of fiber and healthy fats (omega-3s). Aim for 16 g/day to get the full benefits of it. Those 16 g of ground flax seed will give you:
85 calories,
6.7 g fat (0.6 sat, 4.6 poly, 1.2 mono)
4.4 g fiber and
2.9 g protein.

I buy mine whole and grind with a coffee grinder. Your digestive system can't effectively crack the husks of flax seeds so if you don't grind them all that good nutrition stayed locked up and passes right through. Once ground, you should keep the flax in the refrigerator as those good fats tend to spoil quickly.

I am new to this too, but so far I've been filling my snacks with more than just fruit and veggies and adding whole grains, granola, peanut butter, yogurts, etc.