A quickie. Money management is the common denominator in all of sports betting. Here's a strategy for insurance.
Say you have a lock and your budget is 150.
1. Place 130 on the lock: 1-.95 or 1-1.5 = 120-130 win.
2. Place 20 on a 3 team parlay: 1-6 = 120 win.
With this bet, you have your lock plus insurance, increasing your odds of success.
Say you have a lock and your budget is 150.
1. Place 130 on the lock: 1-.95 or 1-1.5 = 120-130 win.
2. Place 20 on a 3 team parlay: 1-6 = 120 win.
With this bet, you have your lock plus insurance, increasing your odds of success.

, that they divide their bankrolls in two, one part for bets up to let's say +250, and another part of their total bankroll for higher odds wagers (maybe even a 3rd part of bankroll for very high odds if those tempt you).