The fifth symptom of anisthita bhakti is niyamaksama, vowing to serve Krishna. While visaya-saigara refers to making vows to renounce whatever is unfavorable to bhakti, niyamaksama means making vows to increase one’s service, such as chanting twenty-five rounds on Ekadasi, but being unable to keep them.
(LFD, Vol2, Being Careful to Avoid Anisthita-bhakti, Pg 54, 6th paragraph)