Assuming you are heterosexual, ask yourself "Would I do/say what I'm about to do/say to a male coworker?", that's a good start. Another good idea is, if they ask you to knock something off, do knock it off. Of course, given that the MeToo movement is about sexual harassment, don't commit sexual harassment: don't fondle people, don't schedule meetings in your hotel room where you hang in your bathrobe, don't pretend to be interested in mentoring people just to get physical rewards (https://captainawkward.com/2016/04/13/852-853-goofus-and-gallant-attempt-mentoring-young-women/).
Go one step further, support women:
Fight sexism, racism, and other -ism by shooting down instances:
These people end up creating enormous problems for the company they work for, either because of lawsuits or damage to the brand or because someone who has no problems abusing people will also have no problems with syphoning money out of the company/stealing, so be sure that you are doing something in your best interest!