Getting married is great, and I feel really good away from the court, and my private life and stuff is good. But you still need to train and work hard. Like, I didn't go on a honeymoon after we got married; I went to Barcelona and trained for 10 days to get ready for the clay-court season. It's been good, but you still have to put the work in.
Staying more controlled mentally stemmed from taking my fitness more seriously. When you're doing track work, sprints and so on, it's pretty painful, but that does make you feel better prepared and therefore mentally stronger when you're going into a match. You know, without a doubt, that you are strong enough to last.