What's the changing of the guard like? The president is like a president of a company, except the rules and practices have been around for 250 years. How does the president elect learn the job, schedule, security practices, how to pick a cabinet, tips for making good decisions, the insider secrets and everything else?
Is there a manual? Does he shadow the incumbent for a week? Is there someone overseer or secretary passing down the wisdom?
How has all this developed since Washington figured it out on his own?
Since 1963, there has been a Presidential Transition Effectiveness Act, and it's been amended twice, most recently in 2000. The 1963 Act gave a skeleton structure to the transition process, allotting office space and appropriating some funding to the successful presidential and vice-presidential candidates from which to plan their team and day-one priorities. Unfortunately, the best study in how the Act functions in practice would be President Obama's transition team, but this is within the twenty-year horizon for AskHistorians coverage. You might check with /r/Ask_Politics for such recent issues.