First dates are tough, especially blind dates. That first 20 seconds of "I am physically attracted to this person", for the shallow it can be over right there but for others....let their personality define their looks. Have you ever met someone who was HOT, and after about 1/2 hour or so you can barely look at them any longer....their face literally changes before your very eyes.... OR the one that really doesn't rock your world initially...soon becomes very attractive. Give the meeting some time for all to relax & be themselves, you may like what you see....but if not. How do you get out gracefully and be kind about it.

Before you even meet, at the point of arranging it....tell them you would love to get together but tell them you may be interrupted due to helping a friend out, someone is town, pick up at airport, etc etc They won't take it personal because you made the plan before even meeting them - it will give you a soft out if things are not going well.
Other options, tell them I can meet for lunch or in between locations, set it up to be short - you always get together again - soft outs....much nicer!

Prepare friend to call or text at a certain time. If you have an immediate attraction cancel the call or when they do call you can say I'm glad you got it worked out and stay......

Never a good idea to watch the phone or take calls while sitting there, it is rude and shows lack of interest. But again if you tell them a head of time they know you have to take a call or watch for a text.

This person may not be for you in a relationship, but friendship? We all have friends and who knows he or she may have a perfect friend for you! I have met some great guys, maybe not for me in a relationship but they are great friends and I have set many of them up with other friends.

Don't say you will call if you won't or yes the "I'd like to get together again" and never return their call or text/email. It's time show some respect to them and yourself, it's not nicer to tell them your interested - then vanish.