First you have to lure them in. The best sissies are naturally submissive and will gladly take your lead. I’ve always liked to start it nice and slow buying them a pair of lacey panties and telling them it would make your pussy so wet if they tried them on usually does the trick. After they try on the panties compliment them tell them how beautiful they look and how you want to see them in more sexy clothes. Buy them some nice lace stockings, garter belts and a pair of sexy red heels next. Remind them how sexy they looked in the lace panties and tell them this will look so good together.
They may become skeptical but tell them you are doing what is best and helping them express themselves. Buy them a sexy corset top and a frilly skirt next. tell them you want to call them by a feminism name now. As they dress up put a wig on them and do their makeup. Tell them you want to make them feel beautiful.
The next part is my favorite. Depending on your sissy either you want to use a strap on or invite a friend over for them. Either way ends up with them on their knees. By this point they will do whatever you want, and you can tell them that they are your sissy slut or your beautiful sissy girl. Tell them you will treat them well but if they disobey, you’ll punish them buy putting their sissy cock in a cage. This is where all the fun begins.