From age 12 to 18 I did quite a bit of hitchhiking. The simplest easiest way to get a ride that's going long-distance is to carry a cooler full of various types of pop and hold a sign advertising that fact. Most of my hitchhiking was on secondary highways and many of the smaller stores had nowhere for a big rig to park. I would stand just past this store with my sign. On any given stretch of road your average car is only going a few miles to work or some other local activity. The big trucks are usually going to put some miles behind them so this was the perfect way to select long-distance rides. While in Québec I held a sign which said I speak English. English speakers who were very tired of the ongoing language battles within Québec picked me up so they could vent on the subject. I'm sure in the states you could get a ride with a sign saying either support our troops or down with war

. When you see an SUV holdup the support our troops sign, if an old VW van approaches flip it over and show them the down with war side. The most ingenious ploy I ever witnessed was a guy who hitchhiked across Canada holding suitcases he had made from red gas cans. He told me that very few of the people who stopped were offended by his deception and they all had a good laugh.
In Newfoundland hitchhiking was dead simple. Sometimes the first car would stop and they would invariably try to figure out how you're related.
While hitchhiking West in Nova Scotia I displayed a sign saying Halifax. Many people stopped to tell me I was going the wrong way.
Often I would find myself at a truck stop or other location where I was competing with other hitchhikers. I always made sure that I washed, had my hair trimmed neatly, I shaved every day and wore my Sunday best. I would walk out of the gas station, stick my thumb out and get picked up long before the scruffy old guy with the yellow cigarette stained beard who had arrived long before me.
By the time I was 18 probably one third of my rides where gay guys. Some of them run a route where they pick up every hitchhiker leaving their town and when they get turned down they drop off one hitchhiker and quickly doubled back to find another

. They had their fantasy and dozens of hitchhiker's got through town.