Sassyhair! I used to blow out my hair once per week. My former stylist taught me how (G-d rest his wonderful soul). The trick is using great tools. U must have a really good blow dryer- ceramic/ion 1800 watts. Then, u'll need a really good quality large round brush- boar bristle- NOT plastic. The bristles in the boar brush are spaced closer and allow for more even tension on the hair thus making it straighter.
Next, section the hair using clips. Use small sections like 2" by 1", clip up the rest to prevent drying. Also, begin with towel dried hair that has some leave-in conditioner, silicone, and mousse applied through out.
There is a technique to using the brush, u kinda roll it but careful not to tangle it in the length of the hair, so its like an underhanded brush/pull through hair while doing a half twirl. Meanwhile in the other hand u hold the dryer with a nozzle attachment directed down the length of hair on high but only med/hot temp.
Yep, sounds like a magic trick. It took me many tries to master this, and as someone said I had the benefit of watching the stylist. I start from the back and then do one side then the other, top, and front last. Always clip up the wet section to keep it wet, not dripping, but wet. The style won't be as smooth if the hair begins to dry before you start drying.
When I'm done with a section, I roll it on a Caruso roller to keep it neat. Just a plain non-steamed roller. U could also use a loose pony tail holder on the section of hair. Yes, your arms will have had a work out when you r done, but I can give the Dominicans a run for their $$$- that's how smooth I can get the hair!
It takes practce, and so as to not make this seem like its good for the hair- keep in mind that years of blow drying took its toll on my hair, dried it out. For nearly two years now I've been doing the wet to dry flat iron (T3) I love this its faster, easier to use and I don't miss blow drying, doesn't damage my hair. And best yet, my hair has grown. Now in truth, I only flat iron 1x per week, then later in the week I shampoo again and wear it natural. So, that's half of the week flat ironed and half air dried natural with some leave in conditioner.