Help from riotier please (Stuck on loading screen)

Hello, my friend plays league and she gets stuck on loading screen often. We play together, so we use the in game team speak. So she is connected to something in league, but she ends up joining the game late. Sometimes she has to restart the client etc. I know this isn't a new issue, ie, this occurs frequently, as is evident from nearly every second post on Technical Support. Apart from the hextech tool(which she uses), what can we do to solve this problem on our end, seeing as how i read somewhere that this type of problem is usually at our end. (Assuming internet connection is not the problem)
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