[Tomisimo]

Welcome to the forums Archemorus,

I'd translate these as follows:

"Hard work never killed anyone... ...important"
"El trabajar duro nunca ha matado a nadie ... importante"

And about soler, no it's not normally synonymous with acostumbrar, but sometimes it comes pretty close. Let me give you some examples.

- Suelo ir a la playa en el verano. - I usually go to the beach in the summer.
- Estoy acostumbro ir a la playa en el verano. - I'm used to going to the beach in the summer.
- Suele suceder. - That usually happens.

Maybe some others can give some better examples.