Check whether the company you work for has any corporate discounts already set up- I work for a large insurance company and thankfully we have a rather fantastic cash back/ discount site on which I can search out retailers and get the best deals on the high street.
For example, we knew which pram we wanted to buy and it was just a case of finding which store we could get the biggest discount on through my work website- we ended up getting 12% off at Boots.com.
If you don't work for a large company like I do you might still be surprised at the local discounts your employer has negotiated- it really is always worth asking.
2.Spend time shopping around
I love finding a good bargain and if that takes me 3 hours on a Wednesday evening thats fine with me. Rather than falling into the trap of allowing shops to make decisions for you about the things you need/want, take your time and consider your purchases as you might be able to find the item cheaper elsewhere or a more suitable option by another brand.
For example, we could have easily been drawn into buying the matching changing bag to go with our pram but we decided not to as in reality the matching one is so tiny that it wouldn't have been practical.
When it comes to the daily needs (stuff to change baby's butt) there's a brilliant website called Bum Deal which helps you seek out the cheapest way to buy nappies, wipes and car seats- for example, we're going to be using Naty nappies to begin with and Bum Deal has just told me that at the moment I could buy 2 packs of newborn size from Ocado for £6 whereas at Boots I'd pay £8.58 for 2 packs at the moment.
Also, although I'm going to try and use cotton wool and water for the first few weeks/months I've kept an eye on baby wipe deals; Bum Deal came up with a Waterwipes deal which looks pretty good; 720 wipes for £19.99 from Ocado compared to 540 for £19.99 from Boots.