Let It Ride gives you two decisions: after your three cards, and again after the first community card. On each you either let a bet ride or pull it back. There's no dealer to beat — you're just paid on your final five-card hand — so the strategy is purely about whether your hand has enough paying-or-drawing power to keep the money out there.
Below, every rule is shown with an example hand. The short version: let it ride only with a made paying hand or a genuine straight-flush/flush draw; when in doubt, pull it back.
Paying hand, three to a royal, or a qualifying straight-flush draw.
Paying hand, four to a flush, or four to an open straight with a high card.