I didn't like the regular rejection therapy deck suggestions so I compiled my own list.
* Ask a random person for their phone number without introducing yourself, explaining why, or anything.
* Ask people for money.
* Ask some store employee if it's alright for you to explore some employee-only area of the store, e.g. their back room, or behind a door marked "authorized personnel only".
* In general, go somewhere you're not supposed to be where someone is likely to discover you and kick you out.
* When you're leaving Point A for Point B, ask a stranger at Point A out of the blue if they'd like to travel to Point B with you.
* ”Do you have a minute to talk about [insert issue]?" Save some time by inventing your own issue.
* Ask someone on the street if you can have your picture taken with them.
* Ask for hugs/neck massages.
* Come to some sort of event. Ask if you can give a quick presentation on something before the main event.
* Ask someone to tie your shoes.
* Ask to trade clothes.
* Ask people to give you a ride to wherever you’re going.
* Ask for a bite/sip of someones’ food/drink.
* Ask someone to sing or dance right there in the street with you.
* Try to buy people’s personal effects, i.e. watches, glasses, phone, for a dollar
* Try to sell your own personal effects.
* Ask someone to rate your theatrical death.
* Ask to cut in line (start at the back and see how far forward you can get!)
* Ask to have a staring contest or thumb wrestling match.
* Ask for a discount on a purchase, or a free sample.
* Ask where people are going, then ask if you can come.
*Ask if you can pick someone up (if they are smaller) or if they can pick you up (if they are bigger).
* When you're leaving Point A for Point B, ask a stranger at Point A out of the blue if they'd like to travel to Point B with you.
* Ask for a bite/sip of someones’ food/drink.
* Come to some sort of event. Ask if you can give a quick presentation on something before the main event.
* Ask to trade clothes.
* Try to sell your own personal effects.
TLDR: The fear of doing something is worse than actually doing it! Don't think just do it and everything will be great.