Conducting brain stimulation at home
At the moment, there are no TMS/tDCS protocols that were approved for the home use in USA or EU. So, please, don´t. Fortunately, TMS devices are quite expensive and cannot be used by a single man. tDCS is easier, but decent companies on the market like NeuroConn or Neuroelectrics will not sell an equipment to a private person.
Foc.us device, by the way, was proved to impair the memory [1].

1.Steenbergen, Laura, et al. "“Unfocus” on foc. us: commercial tDCS headset impairs working memory." Experimental brain research (2015): 1-7.