Automated and cheap.
Used many micro drones all connected to each other wirelessly with the central “brain” controlling them and use to dispatch small but effective explosives all at once, directed at specific targets.
The best time to sell more is when your client just bought something from you.
After completing a low price purchase (that just qualifies them as a buyer), don’t leave the high priced item to an online upsell option. Instead call them immediately, ask them a few qualifying questions and do a whole upsell process (that you can control much better) over the phone (compared to an online simple buy option.)
Get someone to do all the tedious stuff in your life so you can have more time for your important work, and give them insight and access to the “secrets and knowledge” of makes you a success.
Advertise for a free or very low paying apprentice position with you. You need to be able to give them true knowledge they are interested in, and it’s probably better if they are young (late teens to early twenties.) They need to be hard workers, and intensely interested in the areas you are knowledgeable in. Publish (an ad) with a list of reasons why they should not apply (no or low pay, hard demanding work, etc.), and also why they may want to apply (unparalleled access to you and your knowledge.) You need to discourage all but the right people from applying for the right reasons.
Be original and creative, and stand out from the other applicants.
Prepare a deck of cards with questions the interviewer(s) might not ask, but fulfill two qualifications: when read by the interviewer it will raise enough curiosity in him to ask it, and your answer and story regarding it shows you in a good light. Then give the deck to the interviewer and ask them to shuffle and choose any question for you to answer.
Many people are reluctant to call you even if they need some help.
Have a floating, and always visible button that simply says “Call Me!” When they need some help, they click it, fill in their phone number and get a callback within minutes.