We use a staking system for our Bankroll management strategy. We use Small, Medium and Large stakes. A medium stake would be equal to one betting unit. Which means it is the amount that you would normally wager on an average bet. A small stake is usually used for more riskier bets. This amount can be half of a medium stake or even less. And then the large stake is used when a bet seems like a sure winner.
The amounts that are assigned to a Small, Medium and Large stake will be different for everyone. You must decide what your amounts will be and then stick to it. Note, never risk more than 2-5% of your entire bankroll.