Client Crashes

Recently I have had a massive number of client crashes. More than once a day it crashes, including during hextech crafting, when the queue pops and even sometimes in the lobby or when loading into games. In the past my client would crash maybe once a week, so I know it isnt my computer. The last few patches have also been filled with numerous graphics bugs in the champions tab, champ select, and the post-games screen. Aout two weeks ago, I tried to get into the client update, but I have yet to hear anything back. If anybody know how to stabilize the client and reduce the number of crashes, that would be greatly appreciated.