If you can’t get to the exhibition but still would like to see it (and another income stream for the museum.)
A virtual guided tour of the museum, where you progress from room to room, zoom in on the exhibited pieces and get an audio presentation if you want one.
Even though email is an asynchronous system by its nature, it might be useful to have a context of the urgency of reply. Something that is more precise than “low/normal/high priority.”
Use one digit number from 0 to 9 to specify the number of days until you would like to receive a reply. Start your subject line with this figure. Zero for today, one for tomorrow, etc.
A convenience for travelers and income for the public transport company.
Place small vending machines at public transportation vehicles. Payment with smartphones or contactless credit cards.
Building a new product or service relies on feedback from your target audience. Especially when initially testing quickly and repeatedly your assumptions and solutions.
Either create yourself or partner with an existing public establishment (a coffee shop), and have a place where your target audience can hang and get special treatment (free or cheap food and drinks, comfortable armchairs, daily reading materials, and anything that makes them feel it’s “their private club”), in return for their participation and cooperation. A place where you can have planned meeting as well as ad-hoc ones (initiated by either side.)
A simple way to make trash chore rotation easy.
Package trash bags in repeated color sequences (2, 3, 4 or more colors), like red, green, blue, red, green, blue, etc. This way a household can assign a color to each of the family members doing chores, and everybody will know when it’s their turn to take out the trash based on the color of the bag.