There's a lot of common advice give on this forum and from other wedding advice sites. My experience flew in the face of a lot of advice, so I want to share my experience.
1."Only about 10-15 people will drink your signature cocktail". Everyone that drinks had at least one cocktail.
2. "People drink what they want, they won't take suggestions." We had a sign for suggested cocktails based on what we like. All of them were ordered, and many were ordered repeatedly.
3. "People will drink heavily at an open bar." Most of our guests are heavy drinkers, but they drank less than their average. I assume it's because they were busy having fun because the bar wasn't busy.
4. "Don't worry about favors because no one takes/likes them." Every single favor was taken from the tables. We gave ours away to guests because people were asking for more. The DOCs put the extras out so people could grab extras.
5. "No one will read your wedding website." EVERYONE read it. People knew the specific details about us that we had on the site. They came to the meet and greet and morning after brunch only posted on the site. There were a lot of little details on the site that showed people actually read our website.
6. "People won't follow the dress code." Everyone was dressed in formal attire. Our website said creative formal and several people told us that they used it as an opportunity to wear interesting or themed dresses and outfits. It was great!
7. "Make sure you eat because most people don't." We had not interruptions during dinner. Everyone stayed at their tables and ate. They waited to talk to us until after dinner was served.
8. "Few people eat the cake." Everyone had at least one slice. We had a cake big enough to serve everyone, plus a dessert bar, and there was no cake left at the end of the night.
Something I'm really glad we did was bring tupperware. People who couldn't finish their meals (including myself) could get it packed up to take home. It also meant we could take the extra meals home (some guests didn't show) and the extra desserts from the dessert buffet.