Problems solving thread - LG G Watch

This thread will be used to collect all the issues people are having with the watch and then have the solution for the problem right here so that they won't be asked multiple times. I will only list the issues with a solution available and I will keep updating this. Be happy to expand the list on your own.
So let's get started...
Problem:
The watch doesn't vibrate although vibration is enabled on the watch.
Solution:
Make sure the app which doesn't vibrate on the watch is set to vibrate on the phone.
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Problem:
The screen stays on while charging even when the "always on" option is disabled.
Solution:
First place the watch in the charging cradle and then disable the "always on" option (this is more of a work-around and not an actual fix)
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Problem:
Some sort of driver problem.
Solution:
Can be found here.
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Problem:
Can't pair the watch with another phone after you have paired it with a different one before.
Solution:
You will have to factory reset it.
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Problem:
The watch hung up while booting or similar and now it's stuck as you can't restart it.
Solution:
You can force a restart by pressing the reset button for 8 seconds.
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Problem:
The watch won't boot when put in the charging cradle (with power plugged in).
Solution:
Try holding the reset button for 1 second. If the watch boots the cradle is broken. If it doesn't the watch is broken.
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Problem:
Accidentally swiped away a card and now it won't come back.
Solution:
Do a google search (eg to get back weather search for the weather) or reopen the app if it was an app-notification. If this doesn't work check if the google now card is available on the phone. If that is not the case, just wait they will reappear (it can take quite some time though). If it shows up on the phone but not the watch, unpair the watch and then pair it again.
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Problem:
Google search shows "disconnected" although the watch is paired and connected.
Solution:
Unpair the watch and then pair it again. If this doesn't work (sometimes it doesn't) restart the watch.

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Awesome tips, buddy! Here's a few tips for people that aren't aware:
1) Mute (pulling the screen down from top to bottom): This will stop your notifications and vibrations, but they will be there when the watch face is touched. and also prevent your watch from turning on/becoming active when you move your arm around or lift it to the 40 degree angle.
2) Quick Watch Face Change: Without having to go to "Settings>Change watch face" every time to change your watch face, all you need to do is touch & hold your active watch face screen until it shows you the Watch Faces folder.