If it's something minor, I do little to no research, and just buy whatever seems right, with little hassle or wasted. But, if it's something that costs a lot, or something that I'll be using for a long time, I can put a lot of thought into it. For example, I recently bought speakers for my PC - after spending nearly 3 weeks finding out everything I could about PC speakers, brands, etc. I don't, however, linger about after I've made my mind.