Try to practice in the other postures, and during daily activities.
Also there is the recollections of your own good qualities, the practice of sila, and the recollection of the devas, especially those qualities which lead to their rebirth as a deva.
as has already been suggested try to develop a Brahma-vihara practice, particularly metta as it is one of the protective meditations, even if it is hard try to get into a daily practice of reading the Karaniya-Metta sutta in a meditative way, and putting it into practice, also the development of faith gladdens the mind and the recollection of the Buddha, and Dhamma, are excellent for this.
A Sangha is also very important, I am not talking about the Mendicants specifically here, rather any group of practitioners, if their is a group in your area or even a MBSR type group they can provide on hand support and encouragement.
He who knows only his own side of the case knows little of that. His reasons may be good, and no one may have been able to refute them.
But if he is equally unable to refute the reasons on the opposite side, if he does not so much as know what they are, he has no ground for preferring either opinion …
He must be able to hear them from persons who actually believe them … he must know them in their most plausible and persuasive form.