So, gentleman, open a door for a lady. Let the older person (or lady) off the elevator first. Help someone struggling with their heavy packages. Don't worry. Most of us won't get offended, and won't think you're flirting. But, you just may help us end our bad day with a smile.
Dos and Don'ts still applicable today:
* Gentlemen should open doors for ladies. Please actually hold the door for the lady, instead of merely flinging it open and running through, leaving her to sprint through before it slams. Open the door and step to the side while the lady passes through (perhaps saying, "After you," if she hesitates). At this point, the lady should politely thank the gentleman. He then says, "You're welcome," and, when she is through the door, goes through it himself. (10 Rules of Chivalry Every Guy Should Know)
* Ladies precede gentlemen through every door except revolving doors. Gentlemen , if you encounter a revolving door when you are walking with a lady , you should enter it first so that you may push the door. (Of course, you should not push it too fast, so that the lady has to leap like a gazelle to enter the revolving door you've set spinning out of control.)
* When you are taking seats at a theater, concert hall, movie theater, church, lecture hall, etc., the lady precedes the gentleman into the row of seats. In a restaurant, when the maitre d' is leading you to your table, the lady precedes the gentleman.
* Offer her your hand. It is a gentlemanly gesture to help your lady make it successfully through rough terrain, or up and down steps or hills, especially if you notice her wearing stilettos. (How to Treat a Lady)