Lansinoh!!! Get a tube and keep it with you at all times! Don't bother buying more than one tube, you don't need much at a time and you only need it a lot for the first few weeks. 8 weeks on I only use it now if lo's been lazy with his latch without me realising or during growth spurts!
I love my widgey breastfeeding pillow, didn't use one to start with but my lo is a chunk and I had an Emergency CS so as he got bigger he was resting on my scar. Now he's 8 weeks I don't use it all the time but when we're tired it's useful (it's also great to use for naps for yourself!), he's sleeping on it on me after a feed as I write!
I make a lot of milk so leak a lot. Maternity pads cut in half, stuck in your bra make great breast pads!
Snacks!!! Stock up! Even now, especially during growth spurts or fussy days, some days I can struggle to get a chance to eat for a while.
Pump - I got a great deal on a tommee tippee manual pump on amazon for £12 something. I've only used it the once yesterday, I managed to get 7 ounces in 20 mins so seems to work well for me! A friend said to get one for the bottles you use. However a bottle came with it, and I bought some storage bags and just poured into that and stuck in freezer so don't think it's necessary to worry about the bottles you use. But it was really easy to use, easy to clean etc.
Biggest tip... Relax! Baby may not do what other babies do or what you expect or what the midwife/health visitor/dr expects but baby knows what baby needs so follow the baby's lead.
Also listen to yourself, I was in hospital for 5 days, and had been saying something was wrong with my latch as I'd had my nipple bleed, but my lo was feeding well, no midwife watched me latch him just checked once he was on and kept saying it was fine. I finally put my foot down and got to see the lactation nurse the day I was discharged, who agreed with me and realised what I was doing wrong and helped me correct it.
If you can get help from your partner (or anyone else) take it! I got my husband to sit in with the lactation nurse and any other time I was getting advice. In the early days in the middle of the night when your struggling to latch and both you and lo are getting frustrated with each other it's helpful to have someone else to be able to spot what you're doing wrong and help you correct it.
Wind - I was under the impression breastfed babies didn't really get wind, so didn't wind lo to start with, big mistake! Funnily my lo is very windy! (I wonder what he'd be like if he was formula fed!!!). So yea dont forget to wind baby!
Can't think of anything else atm other than prepare yourself and household for baby to be attached to your boob constantly for the first week or so, and during every growth spurt (3,6,9,12 weeks etc)... But don't let that put you off as it is amazing!
Becki x