My 3 weeks before I spent cleaning, preparing ready made meals for the freezer, reading, watching tv and generally relaxing.
To begin with I didn't want to go back to work but around 7 months i missed it, but I am in a job I enjoy.
Working out the finances. Do a list now of your current outgoings for you and anyone else in the house.
Average food shop if done well is around £75 a week. By knowing how much you needto cover you can work out how much you need to save to ensure essential house hold bills are paid for.
Depending on how much your company pays for mat leave, you should be able to do a rough estimate and then when smp comes in you will be able to see how much you will be short by so how much needs to be saved.
Nappies you can generally get a pack for £5. On a good day you will get through average 5 nappies. So you basically need a pack of nappies a week. Work on a pack of wipes a week (maybe 2) so £1-£2 On wipes. If you want to be really eco... buy some flannels but it's a bit of a faff. Don't forget there are loads of vouchers out there and free samples. If you use pampers sign up to the pampers app and scan your receipts to get points.
Also greenjinn app often has cashback for Tesco and Sainsburys on baby products.
Food for baby. Tin of formula is £10 average. I didn't FF but I think it's a tin a week (Someone correct if wrong) if you BF it's another saving.
You don't really need anything else apart from clothes which you can get cheap. Look out for Sainsburys sales when they have the extra 25% off. Or nearly new sales and Facebook are great for second hand things.
If you want any more tips on money saving etc let me know. Due to debts we have been on a shoe string but still been able to do loads and buy all that we need and not go without.