Congrats man!
I'm coming up on 7 years with my wife.
10 years we've known each other.
1. If you are asking for advice... you are a solid person already. People that ask for advice, I find, are among the most quality people in the world. It takes a huge level of maturity to know you have room to improve.
2. Short-term advice for your wedding night:
*Don't feel obliged to say a speech. I did not. If you do, keep it short. Thank everybody for coming on your very special day. And say you feel blessed (or whatever word works for "you") to start this journey with your wife. That's enough.
*Stay close to her all night. I've seen couples separate to be with "their friends" and thank "their relatives". No, don't do that. Stay together. I've been to 20-30 weddings over the past 10 years. The couples that have been glued to each other on their wedding nights - have gone on strong. Those that spent significant time apart chatting with their own friends or their own relatives, have broken apart. I mean... you obviously can't force this... but it's just something I've noticed.
*SHIT. WILL. GO. WRONG. 3-4 things will not go perfectly on your wedding night. I would even advise subtly mentioning to your wife-to-be this fact. If you prepare yourself that the perfect wedding won't happen - you'll feel less stress when it does go wrong.
3. Long-term advice for being married:
The magical tingly feeling wears off. It does. And women... women ESPECIALLY are always looking towards the next thing. (at least mine is). Have that planned in your head and be ready for it. Guys... we like to achieve something great and then take some time off - women roll right on to thinking about the next thing. This can (& will, I predict) be the first big disconnect in most relationships. I bought my house before my wife & I got married. All of our friends have nicer houses because they spent their whole budget on their house. But we are constantly "improving"... and that gives us something to always look forward to. Home improvement is not for everybody - and some couples plan trips/vacations as their something to look forward to (pre-baby making era). Life does not go smoothly - and you also need money & time & patience to deal with those bumps. Sometimes you get stuck in mud (like... not being able to get pregnant, been there - sucks). At those points, realize that you need to be a rock for her. This also means that you will be horribly stressed if you can not vent... and your vent... (wait for this)... needs to be somebody that is NOT your wife. Yup, figure out who that person is... your mom, your dad, your best friend. A lot is said about the strength of the couple - but you need a good support network to make it work. Your wife needs more than you for her overall happiness. You need to be the rock that constantly loves her and reminds her what a wonderful person she is. That will take you very far.
Enjoy your day.
It will go by fast.