Hi Angel, I'm a mum to 3YO (3 this week!) triplet girls so hope I can give you some tips.
Definitely agree that Norland nannies are brilliant, and I really do think it is worth spending the money.
At first we had a Norland nanny from when I was 28 weeks so that my older 2 girls would get to know her, and she could familiarise herself with us etc. She really was absolutely amazing, they are so well 'trained' (can't think of a better word) and their care is faultless. Unfortunately when our triplets were 18 months our nanny had to leave because of family commitments - we were absolutely gutted! We were going to look for another Nanny through the Norland college again, but our first nanny put us in touch with a nanny friend that had had to drop out of the Norland college a few weeks before her graduation (?) because, again, of family commitments and had no choice but to quit. Again, we could and cannot fault her. Since our triplets are older now, our relationship with our nanny is much less formal and we basically work as a team - i.e 1 of us will do the school run whilst the other does the food shopping.
Anyway, getting off topic here!
One big tip would be to accept everything that everyone offers - people will offer to cook you some dinners, but we always find ourselves too polite to accept the offer. With newborn trips you don't have the time to not accept the offer! If someone offers to do some washing/ironing for you, then take them up on it! If a neighbour offers to run some errands, then don't feel ashamed to ask them to do them - they wouldn't ask if they weren't prepared to help out.
I expect you've been inundated with clothes and baby equipment - accept it all! If you don't really want second hand clothes, then buy some beautiful blankets and wrap your babies' up - no one will know that they are wearing random outfits 
Stock up on things in the sales - I've got some basic clothes in ages up to 8 for my triplets. If they are ridiculously cheap then it seems crazy not to buy things. Try not to buy things for the sake of it though.
We've done a bit of a capsule wardrobe this summer (if you can call it that!) with our girls - I seem to buy loads and loads of cheap crap every year, this year I've got them some lovely basics and we are trying to stick to that!
Hope some of this helps - feel free to message me any time! Kate