You can transfer Steem and choose for it to be Powered Up upon sending. So I need to send 10 Steem, but the receiver will get 10 Steem Power.
If you want to do it yourself, go to wallet -> Power Up -> click Advanced and type in the name of the person to send Steem Power to.
Thank you, it is really good to know!
You're welcome! There are lots of small tricks here in Steemit that is unknown to a lot of people, so I'm happy to share those that I know of :)