@Lala89 hosts do often start with lower prices to attract their first few guests and get those first few reviews. However, you have to find a balance and not price too low (can attract less than desirable guests) and beware of bargain hunters too. Guests who do not appreciate the value you already offer are unlikely to ever appreciate it and may well hurt your ratings. Usually the best tactic is to look at comparable listings around you that are getting bookings and price a bit lower until the reviews come in.
Prepare yourself for the fact that some guests are not going to review even if they have an amazing stay. They move on and forget all about it. Also, the guest has up to 14 days after check out to leave a review, so a few hours is nothing. In my experience, only a small minority of guests leave a review the day they check out. They are usually busy travelling or dealing with other stuff.
Some hosts say you should never 'chase' for reviews, especially as guests do receive reminders from Airbnb. However, a lot of guests never turn on notifications or open the messages. I think it is okay to politely remind guests to review (I did this when I was starting out), but just don't do it in a pushy or pestering way.
I am a live host, so usually get to say goodbye to my guests in person. When I was sure they were very happy with their stay, I would sometimes casually mention, "It would be great if you could leave a review when you have a chance and I will of course do the same for you!" No one ever took exception to this.
I would send a nice message a day or two after the stay thanking the guest for being so nice, hope they will come back to visit etc. etc. (try to include something specific to them, so it doesn't read copy and paste) and, if I hadn't said it already on check out, that it would be great if they could leave a review when they had a moment and I will of course do the same for them. Just do it lightheartedly and cheerfully.
I don't remind guests anymore, but that's because I have quite a few reviews under my belt. And never remind a guest if you feel they were not totally satisfied with the stay!