A lead changes the value of risk. Protecting it does not mean always bowling short or refusing an attacking shot; it means knowing what result is good enough.
Count what remains
Check the score difference and the number of ends or shots still available under your match format. A one-shot lead with many ends left needs normal play. A larger lead near the finish can justify lower-variance choices.
Limit the opponent’s big count
If the opponent holds several shots, a bowl that cuts the loss to one may be better than a difficult drive for three. Look for a draw line with a wide landing area and fewer ways to disturb your own position.
Keep useful bowls around the head
Bowls beside or behind the jack can reduce how much the opponent gains from one good delivery. Avoid scattering every bowl in front of the head, where an opponent’s change of length may leave them irrelevant.
Stay with your routine
Use the same stance, visual target and release cue that produced the lead. Make tactical choices consciously, but do not invent a new delivery under pressure. Verify the score after each end.
Source: Bowls Australia Activities Handbook. Check your national regulations and event conditions before a competitive game.
The goal is a manageable next end, not a dramatic bowl on every delivery.
For a shared view of close heads, try WGTS for iPhone or WGTS for Android. Use the official measuring procedure whenever your competition requires it.