I purchased a few domain names that will be later utilized for my clothing business niches. Right now I don't have the products ready so I was thinking of setting up blogs on those and monetizing it through adsense. Can someone suggest if it is a good idea or should i setup a commercial website when the products are ready? (that can take about a year or so)
Build a 1 page temp site so they will be "aged" a little by the time you create the real sites. This(aging) will help speed up indexing, ranking, etc of the site when you finally have them built for your business. You can create all the social media/web 2.0 "Brand" pages while waiting to launch the business sites also. Don't worry about monetizing as you probably won't have enough traffic to make any money anyway.
i think the only issue is when you open the "real" site that it will not be too different (topics and keywords wise), that way you will not have a problem with seo on the real site.