Follow ZDNET:  Add us as a preferred source  on Google. In the US, Mother's Day is Sunday, May 10. That's this weekend, and with the holiday closing in, options have narrowed if you're planning on purchasing an item online. Thankfully, thanks to retailers like Amazon with its fast shipping, there are still a few gadgets you can scoop up for mom that will make it here in time -- but don't delay much longer.  And while I'm not a mother, my 24 years as an eldest daughter have given me a pretty good idea of what you should (and shouldn't) gift your mom. Rule No.1? Don't purchase any type of household appliance or tool unless she specifically asked for it -- trust me.  Also:   5 last-minute gifts your mom will actually like for Mother's Day (and all are on sale) With that said, these are my favorite Mother's Day gifts you can still buy with quick shipping time, so they should arrive before Sunday.…