Clothing Customisation
This is just some basic ideas on how to name your clothing. I've left out the picking of the colour as that's pretty straightforward but naming can be a little more complex and is a chance to make your item unique to you.
The Importance of Colour
I have always found that "Cloak, Black" sells much better than "Cloak", ok so it takes a few seconds longer to make due to the extra bit of typing but if someone knows what colour they are after (and it usually is black /sigh) they are more likely to click on the ones with that colour in their name first.
When it comes to colours which have different shades, make sure you keep it constant. If you choose Blue 242 for a shirt, choose Blue 242 for the pants, that way the customer knows the two should match pretty well. I actually use multiple shades of blue for my items: Baby Blue, Blue, Blue Mist, Charcoal Blue, Dark Blue, Denim, Ice Blue, Light Blue, Powder Blue, Royal Blue and Steel Blue. You can see them all on this chart for the 255/full colour palette.
Coded Messages
I always name my items with their colour numbers. My method is pretty straight forward, I start in the top left of the palette with 1 and just count left to right, top to bottom from there. This page has numbered charts for all the palettes for that method of labelling.
Grid systems are also used by some tailors, they have letters on one side and numbers on the other. Click here for an example of a grid system.
Finally, TK Fashions uses a fairly complex letter & number combination for picking their colour codes. I admit I just cannot get my head around it but as TK Fashions is a very popular website for picking out clothing choices its certainly worth taking a look at.
If you do decide to add a colour code what you choose is up to you, many tailors don't bother so don't feel you have to.
Custom Names
Some of the default clothing names are ... well a bit boring, but luckily as part of the customisation process you can rename them to whatever you like (within reason). They will always keep their default name as part of their description but on vendors and the bazaar they will show your prefered name.
Some popular changes are "Jedi Cloak" for cloaks, "Imperial Officer Jacket" for the long formal jacket, and "Sith Vest" for the decorative vest in black & red. You are only limited by your imagination but I would advise remembering your custom names, that way when customer x wants a "Rebel Shirt" like the one you made customer y, you will know exactly which shirt they mean!
Please remember that fraud is against the rules so no naming an exotic leotard "Exquisite Dancer's Leotard" so you can charge more and hope no one notices. If you do and you get reported you can be banned from playing.
Signature Marks
Whether or not you wish to add your "signature" to items you create is up to you. Some customers hate it, others love it and a lot really don't care one way or the other! I personally use "*Kelsaka* on the end of my clothing names and I have heard people refer to it as Kel's Brand clothing! Customers who don't like having this branding on their clothing just send me custom mails and I make the items with their prefered names.
You don't have to use your name like I do, some tailors use their initials or their business name instead. Its also up to you if you put it on the beginning or end of the item's name. If you go for something like "A-Wear Cloak, Black" then your items will appear at the top of bazaar/vendor pages. However, people searching for cloaks might just scroll straight down to 'c'.
One item I don't put my signature on is band rings, I tend to give them custom names like "With Love Forever" as that is more suited for a bond of unity :)
Outfit Packs
Outfit packs are very popular amongst roleplayers and anyone else wanting to look like they have stepped out of the movies. When naming the items for a pack I make sure I use that outfit's title, so I would make "Tatooine Amidala Pantaloons", "Tatooine Amidala Shirt", etc. That way your customer can see at a glance which items go together for that outfit, which is very handy if they are carrying around more than one.
So many choices
But at the end of the day how you customise your clothing is up to you, do what you feel comfortable with and what works for your tailoring business.