I remember the fear of the first trip to mother care!
I have a fifteen month old and if I were doing it again this is what I would do:
Buggy - Babystyle Oyster, we went for the Mamas & Pappas Zoom, it's fine but every time I am out with my friend I envy her Oyster, it's more compact, has an inbuilt sunshade, better newborn support liner, better footmuff.
Sleep - Bed nest, hire from NCT. We had a moses basket, our whole NCT group emailed within days saying the baby will only sleep on me and hates the moses basket. Some of them went for the best nest and swore it made life better.
Sling Kari Me sling for the hospital, I was too tired to hold her and she cried every time I put her down, next time I will put the baby in the sling and go to sleep sitting up. (My friend tied her baby to her with her dressing gown cord!) Later on Ergo Baby, I love mine, started off with a borrowed Baby Bjorn, everyone I know who used the baby bjorn said they got really bad back pain.
Swaddling Some babies love it, some hate it, my friend swore this was much better than the ones that keep their arms by their sides - Love to Dream Swaddle.
Changing Bag Skip Hop Pronto changing station, this was recommended by our brother in law and it's so useful. You don't need a proper changing bag, I have a backpack. (think you can also get a free changing matt with the boots bounty bag)
Celular Blankets Only if you have a tumble dryer otherwise they go hard and scratchy, we replaced all ours with fleece ones.
Earplugs Seriously! Buy a big pack from Ebay, use them in the hospital, when you're trying to nap in the day when someone else takes the baby for you, when the baby is screaming to take the edge of so you can think clearly.
These are the things that would have made my life easier at the start, hope this helps.