Please don't pray for me; instead, put that time to better use by donating blood. How long would a prayer be about me? It has been a while since I prayed last, but I would imagine a "good" prayer would be about two minutes (unless you do it half-heartedly). I am estimating two minutes as you must pray for God to shine light on me, Jesus to enter my heart, let me realize the wickedness of my ways, etc. And how many times would you pray for me? Does it take just one prayer to save me, or would you include me in your nightly prayers for a week?
Let's assume the latter case. So, you would spend about 10-15 minutes to pray for me in a week. Why not put that time to actual use and donate blood? Blood donation takes 7-10 minutes. If your God hasn't revealed Himself to me like he has done so for you, obviously he doesn't want me to believe in Him anyway, so why try to change his mind? And even if your prayers succeeded, that took 10-15 minutes to save one person. Had you taken 7-10 minutes of that time, you could have donated a pint of blood which could have saved three people. If you're a good bleeder, you could have donated two pints within 15 minutes, and thus saved six people.
Since Christianity is so big on sacrifices, allow me to sacrifice my salvation by having you save up to six people by donating blood than saving one person by praying for me. And, if you're really wanting to save people, why not also be a platelet donor like me by also donating platelets? It may take up to 90 minutes per donation, but you can donate 1.5 gallons of blood and also almost 10 gallons of platelets every year. You can donate platelets to save many children whom God has cursed with leukemia or you can waste your time trying to save someone who God has cursed with rationality.
It just adds up: blood donation > prayer.