I've talked a lot about the virtues of boldness, but it also has a dark side. Too much boldness can lead to recklessness and burnout at the very least.
In Alma 38:12, Alma the Younger counsels his son Shiblon to "use boldness, but not overbearance." By way of background, Shiblon was the the quintessential middle child: not as popular as Helaman, not as rebellious as Corianton. His dominant trait was his steadiness in his beliefs and faith in God.
One of the overarching themes in The Book of Mormon is "moderation in all things," which is exactly what Alma is teaching Shiblon here. Boldness is good, but it shouldn't dictate how you do everything. A daily dose of boldness won't do any harm, as long as you remember that some things need to be done gently.
Here's an index outlining situations in which boldness is the answer.