The mentioning of Allaah’s name before the performance of any deed of importance is considered Mustahabb (highly recommended). Aa’eshah RadiAllaah anhaa reported that the Prophet Mohammad Sallalaho alaihi wasallam said: “If one of you eats, he should mention Allaah’s name, but if he forgets to do so at the beginning, he should say: ‘Bismillaahi-awwalahu-wa-aakhirah.’ ” Collected by Aboo Daawood and at-Tirmithee