Know that salvation isnt always in the QRH.You may have to interpret (eg fuel filter contamination..QRH states flameout possible but doesnt say anything about diverting) or there may not be a procedure at all...electrical bus isolation with smoke when over water..some checklists for elec smoke can be very rudimentary in an effort not to distract you from the land asap principle..
Interpretation of QRH is down to experience and judgement..eg,with fuel filter bypass on one side and several available alternates,perhaps continue..with bypass on both sides and few alternates,obviously not.