Engine

[Ram50808]

Ok guys I know I've been asking a lot of ?'s lately, so here's one more.my truck has been down for 2 years and ive been undecided if I was going to keep it or not, until just recently now finishing my truck is all I can think about! So my engine hasn't started in 2 years.and probly won't be for another year and a half. What do I need to do to maintain it and to make sure that when I finally need to use it I know it will start?
Ps: this site has been GREAT in answering all my ?'s