Faffing around with powerline adapter? I just plug them in.
Not everyone is that lucky though. I used them downstairs and really you need to get the fastest ones you can, the 500meg ones. Even then it wasnt that good. I also have wiring that doesnt allow me to cross rings so I cant do downstairs to upstairs for instance.
Ethernet cables are the way to go though it is worth the effort. First off few years ago figured out how to get a cable from dining room downstairs where master socket is to upstairs. Bit the bullet and drilled hole straight outside near where tv aerial is (little tip drill hole big enough to put a small plastic tube and put this through the hole then thread cable through plastic tube. gives added protection to cable and ensures it goes straight through). Followed tv aerial up wall then went across to canopy over front door which is hollow. So only external visible cable is about 2 metres and virtually hidden. Then drilled a hole upstairs that came out in canopy. Upstairs bedroom along skirting board with trunking into small walk in wardrobe. Up inside of that into airing cupboard then into loft across and down into spare bedroom hidden behind door to 8 port gig switch. 10m cable length purchased off Ebay.
Then when I got fed up of powerlines downstairs for BT TV etc used the 10m flat cable that came with the HomeHub. Just basically followed doorframes/skirting boards and as its flat you dont actually see it took about an hour. Once its down you have the added bonus of knowing full well it will always give you the speed you want.