Power2Improv

Start strong.

The thing about short form improv is: it's short. You don't have a lot of time to fool around, so go ahead and dive in to the scene. Don't waste your energy with waking up in the morning, getting into the car and going to your location, or making greetings to your scene partners ("Hi, Bob." "Hi, Phil. Nice day, huh." "Yep." "How you doin'?" "Can't complain...") start the scene in progress.
Start your relationships in progress, too. Nothing is more boring and gives you less to work with than a transaction scene -- the typical shop clerk and customer who don't know each other scene -- yet actors time and time again will start any scene with a retail setting with the same old "May I help you, sir?" If you were actually in a store and you heard one person say that to another, would you even bother listening in on their conversation? Why would you think your audience would be interested in that, then? Why not give yourself some emotional juice to work with by assuming a back story between these people and going from there? Same store, but: "Yeah, those jeans do make your butt look big. I'm sick of lying to you." or "Great nightgown! Why don't you wear that tonight and we can invite your sister over to join us?" or "I don't need school supplies, Mom, I'm dropping out!" Now, you'd want to listen.