What is the best way to...?

Question:

What is the best way to...?

What is the best way to warm up your voice? I have a pretty good singing voice but it takes about 45 minutes of singing to warm it up. Is there any method that's quicker? Also any random tips offered about singing would be appreciated.

Best Answer - Chosen by Asker: I used to know this singer in HS, and he would warm up singing notes along to his piano. Before performing he claimed drinking a little lemon juice helped him. that's what he said anyway.