If what you are selling has a long run effect on your customer (exercising, financial security, passive income, etc.), it can help if you connect them to their future selves.
In your communication, show them or send them their picture (you can ask it from them for a surprise you’ll be sending them) age processed, software can create their image an X number of years from now. Of course, your message should be congruent with this idea, and help them realize that their future self is the same person they are now, and why it is important that they invest in their future (by paying you.)
You would like to listen to some music or watch a video without using earphones, but there are others around you, and you don’t want to disturb them.
Install directional speakers in smartphones so there is a minimum of sound leaking to others.
Many pools have a semi-transparent canopy stretched above part of it. The sun, however, is always moving, and vast areas of the pool are not under the shadow.
Automatically adjust the canopy’s position by sensing the position of the sun and recoiling and releasing – changing the lengths of the ropes keeping the canopy tight.
After being in the water for a while, getting out of the pool to the full pull of earth’s gravity is tiring.
Have a ledge in the water, that when you sit on, inflates and pushes you up above water level so you can quickly step onto the perimeter of the pool.
Staying motivated is hard.
Get a daily motivational message. It can be a great quote, a short motivational story that takes only a couple of minutes to read, or a tried and tested technique. Collect the ones that helped you and use them from time to time.