Practice not putting stuff off. If it takes 10 seconds or less do it now. Then move up to 30 seconds or less. Keep going up to ~3 minutes. Good example is putting away laundry or emptying dishwasher, etc.
Talk about what patterns of abuse look like. Teach them to recognize red flags like love-bombing, isolating from friends and family, controlling behavior and threats of violence and/or self-harm.
You can waste your time trying to get people to like you, or you can be yourself- follow your own interests, learn what you think about issues and events, music and faith and conscious- and just trust. Trust that the truer you are to yourself the happier you’ll be. Trust that you’ll have better friendships and relationships when you’re around people you don’t have to pretend around or perform for. Trust.
One of the funny/sensitive things about puberty is that kids can be the same age chronologically while being wildly varied in terms of development. Kid might be 6 feet tall in seventh grade or be a senior in high school and still not shaving. Everyone is self conscious, praying to avoid embarrassment. It’s all just part of growing up. Be kind to yourself and to your equally mortified peers.
Institute a “Wall of Fame” for accomplishments and victories, big and small. AND a “Wall of Shame” for minor infractions such as not changing the toilet paper roll, etc. We have to be willing to put ourselves on the wall of shame too - and that’s the lesson: We all make mistakes but we own up to them, fix them if possible and learn from them always. Also good fun. Start our with actual paper version but transition to a shared iCloud album to post wall of shame pics once they are old enough for phones. Maybe even continue through adulthood if they “shame” themselves!