Every company needs to be represented by a recognizable logo that tells its story, that fits perfectly with who they are. We think that each company has its own story, its own personality, but, time is constantly changing trends.
Its difficult to fix rules to describe what is trendy or not, sometimes is a matter of taste, but in spite of this, every year, the popular blog Logolounge.com makes an annual report talking about the future logo trends.
Logo Lounge is probably the most important blog about branding in internet. They have created an online logo database that makes research easier. With over 170,000 logos and growing, LogoLounge has become an indispensible tool for any logo designer. Definitely blog to take into account.