How can you practice aikido by yourself?

Depending on how you view what "Aikido" actually is, it is a Martial Art, it is a way of life, and it also contains spiritual things in it as well. Doing physical techniques requires a partner. People actually do "Aikido" on a daily basis, they just dont know it. Many of every day things that people do like drive a car, open doors, and drinking from a glass are movements which are found in Aikido. Primarily in Yoshinkan style of Aikido, there are fundamental movements called "Kihon Dosa". These movements can be done by yourself and they can be viewed on sites like youtube.com . You can practice Aikido Stretches and other movements by yourself, but to learn the techniques, there is no better place than a Dojo itself.