Making multiple offers on an investment property

[Russell Coble]

I've heard time and again that submitting multiple offers is a good strategy for getting a house under contract, but I don't understand the specifics of how the various offers should be structured.  What is the typical (if it is typical) structure of the series of offers that one might submit including some creative financing options?

Example:

1) 60% of market value all cash;

2) 80% of market value, 20% seller financed;

3) 100% of market value, all seller financed;

etc.