Wear it proudly! In the dog fancy, we call those "honorable scars." I wear low cut tops in the summer, and a halter top bikini, too.
Seriously, unless you are someone who normally gets lots of lumpy keloids, the chance is your scar will be red for about 12 months, with maybe some keliod near the base where there is more muscle tissue-but the brassiere will cover that. That seems to be the consensus--run a search on scar treatments, you'll find lots of threads.
People have used vitamin E oil, and special scar creams, none seem to make too much difference. I used Mederma. Just be sure to wear sun screen when you go outside, especially the first 12 months--don't sunburn a fresh scar.
My scar is great-it would be less noticable if I carried more weight--you can see a couple tiny lumps where my sternum mended under the top part of my scar. Otherwise it's just a little white line. I'm about 30 months post OHS. Even my pacemaker/ICD scar, which was opened twice in 15 months and subject to lots of stretching, is pale and flat now 13 months after the ICD implant.