For right now? Unplug your router. Tape over all the webcams you have. Find a way to make a Faraday cage that will fit all of the internet connected devices in your home. (at the very least, it should contain your phone.) Gradually start leaving your phone at home when going out. Use it sparingly just so he knows you still use that phone and he doesn't start searching for you thru a new phone. If you haven't been, start wearing a mask again. Hide your face. Security cameras are not your friend now as he may be able to surveil you thru those too. Buy new clothes that are different than the type he has seen you wear. Pay in cash. He could track you thru your bank account spending or anything else with your name attached. If you don't have much cash on hand, slowly start withdrawing some during regular purchases at the POS prompt. Above all, remember that the abuse is not your fault. Stay safe out there.