These are not directed at anyone, its just constructive criticism and helpful suggestions. Its hard for us to give direct criticism on here, as we like to support each other and not be the bearer of bad news. Although there really is no right are wrong way to CD, just as long as the clothes/accessories you are wearing are intended to be worn by a woman you are a CD.
-Not being truthful/hiding Cding from their SO, if your in a serious relationship your SO should know about your hobby and you should respect their feedback.
-Purging, why spend all that money just to throw it away? Get a big plastic bin put everything in there and put it some where that's an inconvenience to get to.
-Don't over extend yourself, dress in moderation. Spread your time out over other hobbies.
-Wearing clothes that are way too small, that little top looks great stretched across your beer gut. Clothes are made in a range of sizes for a reason, dress to your body type/shape and age.
-Wearing a bra band that's too small with the straps as tight as they go, and complain about "red marks" Measure and trail and error make huge differences.
-Wearing patterned bras that show through tops, they make nude colored bras for a reason.
-Forms and push up bras, if their glued on you might see some lift. But other wise its a waste as forms to not react to a push up bra like real breasts do.
-Stores that cater to CDs are great but are often have higher prices and lower quality, only buy things you can't get else where example being forms.
-Having their wig too far forward, it should be around where your hair line is or used to be.
-Trying to be sexy or over the top, moderation is usually a more presentable look.
-Posting bikini pictures, if you got the body for it great. If not keep it private, same goes for lingerie pictures.
-Too much shape wear, use only what you need and don't rely on a girdle. Be active and get in shape, at least you will be healthier.
-Stripper heels, having a pair is fine but due to how impractical they are they should not be your go to shoe.
-Taking hormones with out medical or therapists advice, self medicating is very dangerous.
-Leaving pictures on computers or browsing history, its not hard to delete and put good pictures portable hard drive.
-Freaking out when they think they outed themselves, but yet they do everything but shout that they CD from the roof tops.
-Under dressing in public, it won't be long till your outed better be prepared to own it.
-General photography, take pictures in clean uncluttered places and clean the mirror if your taking a selfie.
That's about all I can think of off the top of my head.