Self session
One of the best gifts you can give yourself is to do self-healing sessions with Reiki.
Reiki on oneself is not just about practice. It is also about healing and connection. The more you heal your bodymind, the more connected you will become to Universal Reiki energy. The more practice you do, the more you will be able to feel and sense Reiki energy in your hands.
It is recommended to do self Reiki treatments daily. If you are running short on time, that is ok! Rather than skip a session, simply do an abbreviated session. Take 5 minutes and focus the Reiki energy inward. There are no rules to this. Use your intuition and allow it to guide you and your practice.
Below are the basic hand positions if you need a guide to follow. They are not necessary to follow exactly but act as a good foundation.

Anatomy of a self session
First of all, I want to emphasize that there is no right or wrong way to facilitate a self Reiki session. Some people get too concerned with hand positions and how long a session takes. Let me be the first to tell you to push all this aside.
Whether you have 5 minutes or 50 minutes, it is ALL GOOD!
Before starting a session, you will want to center yourself and ground yourself. There are many different ways to do both, but a few quick breaths and a purposeful clearing of the mind is a good start. Just take 3 deep breaths while clearing your mind. At this point, you can draw in the energies you want to be present (if there are any). Some people call in their guides, or Spirit, or God, or Reiki guides or whatever. Just make sure whatever you are calling in is for your highest good. I like to ALWAYS make that clause. In fact, whenever I call upon guides specifically, I always say “for my highest good”.
Now is a good time to ground yourself. Most people think of grounding into the Earth. I like to ground in a more balanced way. I imagine a chord going from my root chakra down deep into the Earth. And I will also imagine a chord going from my crown chakra high up into the Quantum field (Universe, heavens, whatever sits well with you).
The next part is more symbolic, but I will always either say “Reiki on” or do a little motion with my hands like flicking on a light switch.
If you are wanting to experiment with all the hand positions then it is easiest to sit up with your feet flat on the floor. Start with your head and work your way down.
If you just want a relaxing experience then lie down and use intuition to guide your hands. I always start at my head and end with my hands on my heart.
When I am done, I say “Reiki off” or do a symbolic motion of my hands to turn the “light switch” off.
This is also a good time to go right into a relaxing meditation.
Always remember that, again, there is no right or wrong way. You will know what to do based on your intuition. You simply CANNOT mess it up!