Been married for 9 years in aug, let me shed a little advice;

Never Never Never agree when your wife says "these jeans make my ass look huge".

Never admit to not liking any of your in laws, its a trap.

Always complement your wife atleast every other day (its a woman thing).

Show appricitation for your wife and the things she does that you don't want to do (food shopping etc).

After while all couples get comfortable, always spend atleast one night a month on a "date" and make her feel special.

When Wifiee is happy then everyone in the house will be happy (the reverse is the same also).

Congrats man and keep in mind that the wedding is just for her (holy crap I just agreed with Ronin), she will be stressed so to help ease the stress the night before the wedding get her some flowers and a cheesy card (woman love cheesey romantic crap even after your married), it will help ease the stress and even further seal the deal.