Firstly, specify your Startup needs
Don't hire a Startup consultant with Pre-Packaged Solutions
Check with Colleagues
Don't shop for bargains
Meet Face-To-Face before you decide to finalize
Search for a professional 'Chemistry' , 'Comfort' and 'Feel'
Ask for a proposal in Simple, Jargon-Free language
Ask for the assessment of worst-case and best-case scenarios
Find a consultant who will empower your Startup to scale
If you hire a Large consulting firm, insist on a final approval over who will service your Startup.