We don't do vocal "warm-ups." We also don't do "SLS-exercises" per se. We don't give "tips," and we don't do "tricks." I hear these words thrown around that don't mean anything, and I understand that it's just someone's lack of understanding. But it's important to get this.
First, we don't warm up the voice. We balance the voice. What does that mean? It means conditioning the voice's balance between chest voice and head voice on each pitch and each vowel, and we use different scales as tools, or vehicles, to accomplish that. The term for singing scales is vocalizing. Seth and I come up with new vocaleses almost daily to assist a specific singer in a specific situation in the best way. The outcome is the ability to sing in the entire range in a connected, even voice. Vocalizing has to be done correctly, the exercises themselves do not create the balance automatically, it's how you vocalize, how you sing the exercises, that will create the result. It also has to be done on-going. Luciano Pavarotti famously said: If I go three days without vocalizing, the voice is gone."