Actually you should be "careful" with your tips. I do not say they can't be working - however everybody should find out for himself.

"Take a warm bath:"
When doing this too often it might also hurt your production of testosterone. Which is bad for muscle growth. Details found here: https://steemit.com/health/@theaustrianguy/instantly-boost-your-energy-2-the-power-of-cold-showers

"Avoid training during late evening:"
This really comes down to personal preference I suppose. For my part I get way more weight and/or reps done in the evening than in the morning. Therefore I should get in better stimulation. Just find out for yourself.

"Avoid watching TV in bed:" You can watch with low light intensity. There also are special apps for the evening which dim your light. However, I agree that reading is better.

"Sleep 7-8 hours: "
This one should be just adapted to your body. Most people might need 8 hours. For my part as an example 6hours is perfect. If force myself to sleep 8 hours I am way more tired than sleeping 6 hours.

You wrote "personal experience" above those things. I think this is key. There are a few things that count for everybody (like healthy eating) but in the end you should just listen to your body and do what feels right. I don't mean that "oh that gives me the best emotion at the moment-right" - I mean that feeling when you are just happy in the long run.

Good article though, thank you!