I am going for a Reiki attunement, any advice on the best frame of mind to be in ?

There are several things to take into consideration:

a.  Be willing and prepared to accept the attunement - this sounds obvious, I know, but it really is necessary
b.  Drink plenty of water after the attunement
c.  Be prepared to feel fairly rough for up to 21 days - this is the Reiki energy working within your body, clearing out the toxins and blockages
d.  Use the self-treatment processes as this will certainly help you to cope with the following 21 days
e.  The more you practice running the Reiki energy, the easier and stronger it will become
f.   Enjoy using the Reiki energy

Reiki has certainly helped me to turn my life around and I absolutely love using the energy every single day - I hope your experience is as positive.

Brightest Blessings

Sarah

Thank you Sarah, although I read your post after the attunement, it was a very pleasant experience and thank you regarding the drinking of water, I have heard that quite a bit.
Hopefully I will not feel too rough, I had prepared a month previous with clearing my chakras and karma.

I am looking forward to using reiki to help others as well as self treatment, I shall keep you posted as to how I get along.

Blessings to you
China