Clinton's attack commercials are starting to take my advice (too bad I'm not paid for this) in that they're using his own words against him. This is key. It's hard to claim media bias against your own utterances. Trump hands us gold in this regard every. single. day. I would hammer all that home constantly. Not the racist stuff, not the hate, or the silly crap. The sheer, dangerous level of incompetence and ignorance on display by this man regarding economics, foreign policy, current events and even his ignorance of basic civics. Wrap it up for the viewers, taking them into a world where the consequences of Trump's policies and stupidity are clear for all to see. Show them those results.
The GOP loves to sow fear. By God give the American people that fear. Not the bullshit the GOP peddles, but the very real, very legitimate fear a Trump presidency would bring. Show them what things would look like with a wall on our southern border. A police state raiding homes and splitting up families. Widespread unemployment and economic meltdown from Trump having the US default on it's debt. Food and service prices soaring for lack of people to work those jobs. A world without NATO, but one where every other country has nuclear weapons. Global warming causing widespread damage across the US with drought, flood, and super strong hurricanes. A supreme court with three Trump appointees on it that rubber stamps any policy Trump wants to push through. Show people that this isn't a fucking reality TV game, but the real world where consequences matter more than getting voted off some god forsaken island in the middle of Buttfuck, Egypt.
Then hit his dumb ass HARD in the debates. Trump will have crammed in order to look somewhat knowledgeable about the presidency. That's all he's got. He will try to change the subject, and naturally browbeat Hillary. Do not let him do this. Go into detail, make a deep dive into policy and do not let him play touch and go. Expose his ignorance, and bruise his ego. Never let up on that ego and he will lose his temper. The more angry he gets, the more dumb shit will come out of his mouth. Bring up lots of basic details about government and civics that I guarantee Trump doesn't know, but that any President should absolutely have a thorough knowledge about. Do the same with world events. Every time you expose more ignorance, play that shit with just the right amount of condescension and feigned unbelief about Trump's qualifications. Hillary shouldn't come off as haughty. She would have to play it just right, but Trump will be devastated. He will probably blame the media, the debate format, and everything and anything else he can, and he will probably try to skip the next debate, which will look really, really bad.
The debates are the game changer. Hillary should be prepared for Trump's obvious avenues of attack (her husband's infidelity, her email and Benghazi) but that's all Trump has. His hand is so weak for the debates, if I were him I'd be scared to death. But I guarantee you he is NOT scared. He is classic Dunning-Krueger to the extreme, and doesn't know how fucked he is.