The advice is good; I think that the "(in a startup)" part is not even necessary. Being in a not so easy situation during the past I'd add one more general adv

The advice is good; I think that the "(in a startup)" part is not even necessary. Being in a not so easy situation during the past I'd add one more general advice: Show that you care. It's not that your partner won't forgive you if you forget a birthday just because a birthday is a day you should never forget. It's, I think, that such days are "frontiers" and ignoring them gives the impression that you just don't care. So, try to show that your job is not the only thing you care about in your life. Surprises, even little ones, significantly help.