If we want to remember Krishna at the time of death, we will have to practice enthusiastic Krishna consciousness now. Enthusiasm means we are always aspiring to advance in spiritual life. Bhaktivinoda Thakura explains that spiritual advancement means first becoming properly situated in strictly following the rules and regulations according to our position, then knowing where we want to go and how to get there. But be careful not to define spiritual advancement by some material benchmark.
LFD Vol 2 Pg 35, Paragraph 3