Two things you want to avoid when flying are missing your flight because you spent time circling around the parking lot for a space and upon arrival not finding your luggage on the carousel.
Two services aim to help you with that.
To find out what your airport status, average security wait and best parking options visit About Airport Parking. Their home page shows the Main US Airports. Check a more detailed list for other facilities.
They currently provide information only on US airports.
According to many recent news articles, problems with handling or should I say mishandling of luggage by airlines keeps growing.
If you have an important meeting or leave for a vacation and do not want to be the emperor (or empress) with no clothes upon arrival, for a fee Luggage Forward can handle door to door pick up and delivery of your luggage as well as sports equipment such as skis, bicycles, surfboard, golf bag and also car seats and baby carriage for you parents with young children. 
Their website states that they can accommodate same day booking and shipping. They are based in the US but also offer International Service.
A write up on About Airport Parking in Lifehacker got my attention as I intended to write about the other service. Luggage Forward shared their information with me.
I hope you can put all this to good use.
My last Air Travel Story was on Travel Away from the Crowds and the launch of Silverjet.
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We are ready to launch a similar feature on our website that allows users to rate the parking lots aftre their trip, however, we also allow travelers to book their airport parking in advance, saving them money and time. They are guaranteed a parking space. Very useful during peak travel times.