Don't ask your DH / DP to "help" you as it implies that all responsibilities are yours and he can get away scott free unless you ask (which of course we don't do nearly enough - especially to DH / DP as they should know! in hormone addled mind this can become huge bone of contention and cause problems where there aren't really any). Make sure any chores that were his/hers before birth are STILL his/hers afterwards.
Call health visitor for any concerns you have even if they seem trivial - it's surprisingly easy to miss the obvious and worry about something completely normal and easy to fix (hadn't occured to me that teething could be cause of clingyness / sickness etc...!)
If your / his mother offers to come and stay for a while, take them up on it - they WILL be useful and if nothing else will do your washing. Try not to take offence at them constantly cleaning / washing etc, they really are doing it to help. Only let them come after DH / DP has gone back to work and you have had time to get to know baby alone and establish yourselves and how you want to do things as a family before someone else comes to tell you how to do it. (hope that makes sense)
Stick to your guns if you believe you're doing the right thing and don't bow to peer pressure about what you should be doing.
Enjoy your new role as a mum but don't lose sight of who you were before bb was born - if perfect nails / hair etc were important to you before, make sure you get time to spend on these at least once in a while - it will make you feel more in control of your post-pregnant body and give you something to feel good about (sounds stupid but trust me) will also help you feel a bit like the old you again.
Above all enjoy as much of it as you can - even the late night feeds - they won't last long and you might end up missing that special quiet time with just you and your baby
Izzybizz and sherlock, you made me cry - DD1 only 11 weeks old and I'm prob still over-hormonal, but still...