I learned this lesson last year when performig at school. People kept wanting more tricks and I ran out of hard-hitting ones, so I my reactions went don't hill when I started doing tricks that I hadn't practiced enough.
For me, I always have at least one strong trick that I can do. If you have Dresscode, get into the habit of wearing the gimmick so you can perform it at any time.
Perform an opening effect. Dresscode will work since it is fast, visual, and very unique compared to most magic. Try one more trick that is really hard-hitting. It sounds like your ACR will do just fine.
I prefer to only do 2 tricks in impromptu situations, but if you have 3 solid effects, there is no reason why you can't do all three.
If it is an impromptu performance I stop after 3 effects and hand out business cards. Works every time.
Take Rick's advice.