I'll tell you what !!!

Dave Let's go to the movies in Prickly tomorrow.
Kuno Ok, where should we meet. Do you know where Lot 10 is ? We went there together.
Dave No, I don't remember. Let's meet somewhere outside Prickly.
KunoI'll tell you what -- name the place and I'll pick you up.
Explanation :
In spoken English, you use I'll tell you what or I tell you what to introduce suggestion or a new topic of conversation.
Example :
I tell you what, I'll bring the water in a separate glass.