1. Nursing pillowI have a Boppy nursing pillow, and it was essential for the first few weeks of nursing. I took it with me to the hospital when my son was born and used it every time I nursed for the first several weeks. I don't use it for nursing anymore - a lactation consultant that came to the house when my son was a month old encouraged me to learn to nurse without the pillow because it would be liberating when I realized I could nurse anywhere, anytime without the pillow, and she was right. I still use the Boppy to prop up my son when he's playing, so it's still getting good use, and I'm glad I had it at the beginning when I was getting the hang of things (and also because nursing in those early days takes SO MUCH LONGER since baby is not as efficient of an eater and falls asleep constantly - my arm would have fallen off if I hadn't had this pillow to support his body).
2. Feeding smartphone appI love the Baby Connect app on my iPhone; I use the timer function to time each nursing session. This was extra helpful in the beginning when my son was constantly falling asleep while nursing; I would check the time to see how long he'd been eating to determine if I needed to wake him up to eat more or if he had already nursed for a decent amount of time. Especially for those middle-of-the-night feedings, I'm not with it enough to watch the clock and remember what time I started, so the timer is handy to have. I also like that it keeps track of which side I last nursed on so I can be sure to alternate sides each time to even out my milk supply.
3. Lanolin ointmentThis stuff was my best friend for at least the first month of nursing; as a friend advised me, it's best used proactively -- if you wait until you have cracking or soreness, you're fighting an uphill battle. I like the Lansinoh brand (I didn't hear good things about the Medela brand - it's supposedly much thinner). Just go ahead and apply it after every time you nurse to prevent or minimize any issues. Make sure you use nursing pads, though, because this stuff is greasy and will leave an oily stain on your bras or clothing.
4. Nursing coverEveryone has their own opinion about nursing in public, and I have no problem with people who choose to go cover-free; however, I'm too modest of a person and feel more comfortable using a cover if I'm nursing in public. It took me 3 different nursing covers to find the right one for me. I tried the Udder Covers one, which was too thin/flimsy and felt like it would fly up in even the slightest breeze. I then tried the Itzy Ritzy Nurser cover, which was lined, so it was heavier weight and not see-through; however, I was still always paranoid that it would shift while I was nursing and I'd be exposed on the sides, so I was hesitant to use it and usually resorted to nursing in the back seat of my car. I also didn't like that these covers only covered my front, so if I was wearing a shirt that I had to lift up to nurse, part of my back would be exposed.
One of my friends finally introduced me to the stretchy, jersey knit full-coverage-style nursing cover (hers was the Covered Goods brand). After looking at hers, I sewed my own using a yard of jersey knit fabric from Hobby Lobby (I had already bought 2 nursing covers so I was going the economical route). I LOVE this nursing cover and finally feel comfortable nursing in public with it - I like that it goes all the way around, so there's no chance of being exposed on either my front or my back. I nurse with one arm out the neck hole (think toga-style), so I can easily peek in without having to have the rigid boning neckline that most other nursing covers have (which make them less compact in the diaper bag - this nursing cover folds up way smaller). If you decide to make your own, make sure to taper it at the top - the neck hole should be narrower than the bottom opening, or else it will drape too low when you use it.