Remember to call or email after a meeting:

Call or email after meeting a Mistress, thank her for meeting you and spending time with you and tell her how much you enjoyed your evening.  Then see if she's interested in setting up something for a few days later.  She’ll be irritated if she doesn’t hear from you for a week or two weeks and assume you’re not interested or you’re playing games.  You should call or email the next day or the following day.

Some Mistresses want to do the calling and don't like it when a guy harasses her by calling too often but they usually let you know if they want you to call or not.  So listen and pay attention.  If in doubt, mention it during the meeting, ask her if you can have permission to call and contact her or ask her if you should wait for her phone call. 

If there's an emergency and you have to go out of town or lose contact for awhile, be sure to let her know.  Some submissives guys have military service, travel for work, or other obligations so make sure you let her know what's going on and that you're out of contact for those reasons.  Don't contact her after you come back, let her know beforehand where you're going and when you'll be back. 

Note:  I know most of this is common sense, but you’d be surprised how many slaves and subs don’t have any.