A good follow-up strategy is something that you need to have to make sure that you can succeed and crush it. This was an absolute game changer when I started utilizing more follow ups in my outreach strategies.
Due diligence by definition refers to the investigation carried out by a business or person, before entering into a contract or an agreement with another business or person. It can be useful prior to "going on the contract" and even "post-going" on a contract, during due diligence or feasibility period. Due diligence provides clarity on the deal which you plan to purchase.