A young woman has attracted a huge audience on TikTok after sharing words of wisdom from her protective father—who happens to be a Secret Service agent. One of his lessons, she claims, saved her life. In her videos, Lauren Bell, of Pennsylvania, shared her dad’s gritty tactical advice to his little girl, the words superimposed over sugar-coated scenes—making a parody of viral memes of inspirational quotes. With less dreamy idealism, her dad’s coarse, salty words turn up the dial with a tone more hard-boiled than heartwarming. Among other savvy one-liners, the agent impressed the need for Lauren to stay hyper-alert of her surroundings at all times. More advice includes: “Nothing good comes after 11 p.m.,” “Never take a jog before 8 a.m.,” “Keep your head on a swivel,” and “Nobody in Miami is your friend.” Mindful of his daughter’s safety—she being a young woman and all—he also instilled street smarts for socializing on the …