MBP Pro wifi keeps dropping

The wifi on my MBP Pro Retina (Mid 2012) - (16GB, 2.6GHz i7) keeps dropping. I have to disable and enable the wifi and it continues to work for a while. The latest OSx patch 10.10.1 helped for a while but the problem is back and it is even more frequent.
I have been following this online and have tried many ideas suggested online and none seems to work.
Thank you in advance...
PS. I use a apple bluetooth keyboard and mouse and have multiple screens connected to the laptop (i.e. the laptop much more like a desktop) and all patches through AppStore are installed.

Try following
Goto System settings network --> options --> WLAN/Wifi --> change your Wifi to top
Find out which DNS is best for your Wifi by installing and running namebench (Link: https://code.google.com/p/namebench/)
Change your WiFi DNS to that result (Goto System settings network --> options --> DNS --> DNS-Server)
Last (wait to) install OS X 10.10.2! I'm using the beta and that fixes the issues on my old router.

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