My partner has his Lantus shot first thing in the morning. He can't remember whether he took it or not this morning! We are assuming it would be foolish to have a shot now 'just in case' (risk of terrible hypos). He is going to keep a close eye on his BG level, and if it shoots up inexplicably should he reckon he did forget it and take the shot then, or just control it with correction doses and start afresh tomorrow. And yes, he is feeling a bit silly!