Not knowing ones spiritual choice or direction this is a bit of a stab in the dark but....
An Ocean of the Ultimate Meaning by Khenchen Thrangu, published by Shambala, Chapter 5 Enhancing stabilty in meditation may be helpful.
Focusing on thoughts addresses the necessity of combining meditative practice with daily activity and such things.
There are specific remedies for active minds impinging upon a stability meditative practice that may be employed, but perhaps this is more the area of concern than that.
"This order considers that progress can be achieved more rapidly during a single month of self-transformation through terrifying conditions in rough terrain and in "the abode of harmful forces" than through meditating for a period of three years in towns and monasteries"....Takpo Tashi Namgyal.