If the socket is loose, slightly bend one of the plug bits inward.

Universal adapters are bulky and heavy, and sometimes you don't have space to plug them in the wall. Instead, favor a one to one adapter. You'll have many of them at home, but, at least, you'll travel light.

Don't overload a socket with too many devices. They'll need more time to charge as they'll share more amperes.

Buy as much as you can extra batteries, or XL batteries to avoid having to charge at the airport, on board, or anywhere else.

And spend more time visiting rather than having your noses on your screens !