I've made many tack sets..I'm actually currently working on two now, one English and one Western.
When it comes to blinging out tack you really want to make sure you have nice quality products, don't take short cuts..If you find a plain set you like there are a TON of different possibilities you can do. It's always awesome to make my own sets and I'm "prouder" of those sets..
Okay, you already have the bridle you like..You can Google "wholesale conchos" and find a ton of different styles and conchos to pick from, try to make sure they are screw conchos. If you want to add crystals, I always use Swarovski crystals, I buy them wholesale from a website (I'll post below) There are many different colors to pick from, whatever your taste or tack colors I promise there is a perfect color to match..Once you have your bridle, conchos, and crystals you always want to play with the set before punching holes for the conchos and gluing the crystals..Once you play with ideas and find out where you want the conchos, you punch holes where you want to place the conchos and just add the concho in that hole..When it comes to gluing the crystals down I always use E-6000 glue. It works the best and I haven't ever had any problems with crystals falling off. Walmart or any craft stores have the glue and a little tool, it's basically a plastic stick with wax on the end that you pick up the crystals with and place on the glue. Make sure you let everything completely dry before moving the tack around so the crystals don't move around or fall off..Also, if possible, keep the bridle in an area that doesn't get extremely cold. The cold weather will cause the glue to become brittle under the stone and make it easier for the stone to fall off if it gets hit on something..Be sure to clean the tack after it gets sweaty..
A very important thing when it comes to ordering the crystals..Always make sure they are Flatback crystals..Not Hotfix or roundback crystals..
This is the website I always order my crystals from. They are the cheapest here, you also order them in bulk to make it easier on yourself..I always order in "gross", a gross is 144 crystals.. Swarovski crystals wholesale, Rhinestones, Swarovski rhinestones wholesale - Crystals 2 Love
This is a color chart of all the crystals. Swarovski rhinestone and crystal color chart - Crystals 2 Love
And a size chart..I usually use a 16ss..I've found it's just an all around great size and fits everything..You can always play with different sizes though. Swarovski Rhinestone and Crystal Sizes - Crystals 2 Love