How to select the best logo design for your company?

Meaningfulness:
Your logo should contain a clear meaning so that your logo can spread the message about the distinguishing characteristics of your business.
Uniqueness:
The uniqueness of your logo will help you stand out from the crowd. For example, if everyone in your industry uses a particular symbol (i.e., travel agencies often use globes in their logos), try to use something else – that way, your logo doesn't just look like everyone else's.
Professionalism:
In the quality of the graphics, the printing, and the paper on which your materials are printed, Professionalism must have place in it.
Timelessness:
While designing your logo it must keep in mind that the timelessness in your logo will ensure that you don't have to redesign your logo in just a few years and that your investment and equity in your design will be lasting.
People can remember your logo:
Consistency in use of your logo, tagline and materials. Repetition of similar elements, used in the same or similar ways, helps people to remember who you are and what you do. Your logo should reflect the quite memorability so that your logo stays at the forefront of your potential clients' minds. That way, they'll think of you next time they have a need.
Differentiation between the colors in your logo:
Differentiation between the colors in your logo should not just in terms of hue, but in terms of value as well, so that it translates well either to black and white or greyscale and colorblind people are able to see it.
Unity in the logo:
Unity among the different elements in the logo will be ensured. The logo must fit together as a single unit, and not just appear as a jumble of elements pasted together.
Scalability:
There should be scalability in your logo so that your logo looks equally good on both a business card and on a sign for your business (or a billboard!), and at every size in between. Your business's name should be legible at different logo sizes – be sure that your designer chooses a font that is easily readable.
Having a professionally designed logo:
Having a professionally designed logo can really give your business a jumpstart and helps your business get the attention – and clients – you need to succeed.
Go for Professional Logo Designers:
You might save a few dollars doing your own logo or getting it done from the next door boy who knows the basics of designing but if you are serious about your business you should always go for a professional custom logo design firm. Your corporate logo is your identity, your customers recognize you by your logo, so the more professional and sophisticated your logo is the better will be your customer’s impression about your company.