To try hard
Examples
When something has been perfect, there is a tendency to try hard to repeat it.
Acting like an adult and being professional on set and getting my work done has just been a lifestyle for me. It's not something I have to try hard to do, necessarily.
I'm a competitive person and it is in my nature to try hard in every match I play. The only time I'm not competitive is when I'm playing against my mom.
I don't think young men or women should feel pressured into marriage. You shouldn't marry anyone, in my opinion, who you have to try hard for.