How do you summon things like objects and DCs?

Share your best summoning method, or tell us what you want to be able to summon, and maybe others can suugest the best way you can do it.

One of my favorite tricks is to pretend that I have remembered something. I will just act as if I really do remember, for instance that I left a sports car, parked outside, and that I have the keys in my pocket. I may say this out load to add realism. "I am glad I have a fancy car outside, it will save me from having to look for one." :ike that.

How about you?