A pleasant attitude, being polite and, having everything in a bag that can be sent through the x-ray helps a lot with security, so does wearing open shoes, or at least shoes you can remove and put back on very quickly, no lace ups that you must untie ad re tie.
In flight there is Wi-Fi on some flights now (thanks to Jet Blue from Viasat.) Of course no contraband in your country of origin, any place you will land or, your destination - laws vary so check those ahead of time.
Offering a gratuity to a concierge service can help and, depending on the country, other staff may also accept tips to expedite things for you. They are also very cognizant of some issues such as agoraphobia (calling it fear of crowds is best if the staff do not speak your native language. If you must hurry through security, feigning an injured foot or a limp helps, they don't want to keep you on your feet longer than they must.
If going through the airport really does totally freak you out, it may be worth hiring a private body guard for an hour or two - yes you can do that. His job is to be sure you feel as safe as possible PERIOD and, if that means he has to do all of the talking, keep people a specified distance from you and, carry your bags then, that's what he does. All you need to do is tell him what you need ahead of time and, you're good to go, he'll see that your wishes are met to the best of his ability - you're paying him, you're the boss. (and yes you can get a female body guard if that makes you more comfortable from most agencies.)