I spent a few hours with a young woman last week, at the end of which we agreed that we should get together again soon. I texted her at the end of the business day yesterday with an invitation to get together, and I waited.
I should have called her, left a cheery voice message, and known that my call would be returned with the prompt attention that it deserves. Instead, my text, like that proposal you emailed last week, sits in an inbox waiting for a speck of attention.
I should have called her, just like you should call your current prospects TODAY!