I have disagreed with you frequently, but never have I disagreed with you more. You have spiritual self-focus and spiritual impact exactly backwards. 

The question IS "Am I doing enough?" It's what we DO that counts.  

"I didn't do much for others,   but I sure prayed alone a lot--and darned well too, if I say so myself," would be a horrible legacy.

"I fed you." "I loved you." "I served you." "I cried with you." "I married you." "I sat with you." "I held your hand in the darkness." "I donated to you." 

"But did I do enough?" That's EXACTLY what a Christian should ask. Why don't you think so?