Footwork is your ally in this mission, you have to be willing to dance with your opponent on the mats. Of course by accepting to dance you put yourself at risk of walking into your opponent’s traps, but this is the name of the game in judo.
Avoid telegraphing, use footwork in all directions, don’t make the mistake of luring your opponent to only one direction, which is backward in this case of Uki waza, this is a beginner’s mistake. A veteran judoka will detect it and see it coming a mile away.
Instead, dance with your opponent in all directions, and keep at least 3 throws in your mind, including Uki waza. Each throw you have in mind should be applicable in a different direction, this way, you will always be ready to strike whenever an opportunity presents itself.
A fitting example of 3 throws would be to have Uki waza, Yoko otoshi and Tani otoshi in your mind. These three throws complete each other, each one of them is applicable in a different direction.