I would agree that communication is a biggie; I found that a book called And Baby Makes Three by John Gottman that was really helpful. But it may be hard to get the hubby (partner) to read it so another book is Babyproofing your Marriage, it is pretty funny and it does hit some good points.

But if I had to list things that have helped me:

1. Communication, this includes on everything; kids, housework, sex, in-laws, etc.

2: Trying not to hold resentment towards the other and help each other out.

3. Date nights or just time away from the kids to be able to concentrate on each other

4. Doing little things for each other, remembering what made you fall in love with each other

5. And you could always try some new things in the bedroom, not saying you have to get crazy (unless you want) an interesting website is www.pureromance.com