If you have a company logo it is always a good idea to have a high res. version. This way you can use that logo to resize down to any other size without distorting the logo and you can make it as big as you want without going over the original size! Here is my first high res logo, I think it came out pretty well. Created for http://www.gurubooking.com.

Click to view the high res. version (you must allow pop up)