So, my favourite quick nifty hack is a physical one; Our wireless router has to serve quite a big home, and it sometimes struggles to get signal out to the rest of the house when it sits in the middle.
I went out and bought a good antennae for the router, but even that still had troubles.
The antennae had magnetic feet, so I went out to the garage, grabbed an empty metal paint bucket and stuck the router on it. And that, having an empty metal container holding the antennae and attached to it, boosts the signal so much it reaches everywhere.
And that’s probably my favourite little hack, cause it lets me use my computers anywhere around the house.