1. Endorse Paul Ryan...Trump did that later in the day.
2. Stop talking so much...I'd say what he should do is vary the setting for the talking. We see rallies or one-on-one TV interviews. We never see him relating to ordinary people in a relaxed setting. (We do see him bring an individual onto the rally stage.)
3. Find a message. And stick to it....He's had a consistent message for over a year! It's "make America great again." I guess Cillizza thinks there are too many specifics under that heading.
4. Stop picking dumb fights...Yeah, obviously, don't do that Khan thing again. Leave private citizens alone. Fight the powerful.