Witty Rejoinder said:

Dontcha hate it when you forget to buy the one ingredient that without which you cannot even attempt a meal. In this case the Mexican seasoning… Pizza will have to be made instead but this abrupt change of plans is quite discombobulating. T&P are much appreciated.

write a list. I have paper and pen by the computer where I write my shopping list as I remember stuff I need. I can then go to the shops content in the knowledge that I won’t forget anything. Of course this relies on me remembering to take my list.