Step 1: Want to get closer to God. If you want to then it's pretty much 'job done' - everything else will follow in time. If you don't want to then it's going to be pretty difficult, one way or another!
If you do want to then it's probably valuable to do a little bit of 'self-analysis' and think about why you want to. Maybe even write it down to encourage you in future.
Step 2: Here are some generally good ideas to help you out:
a) Pray! It's just about the only thing everyone agrees on!! Pray all the time. Talk with God about everything.
b) Get out there and serve God! God tells us to help those in need, so find a need which you can help with and go help out! You might be able to find something to do near you or you might have to go further afield to do this. 'Little things' count just as much as 'big things' - it doesn't matter how much time or money or effort it costs or how many people are helped or anything like that - just go do it for the people God created and loves! (That's everyone by the way.)
c) Read the bible! A classic and timeless suggestion! Definitely worth it, often very enjoyable, almost always very tricky to get around to for most people. Don't be annoyed if you don't do it as much as you'd like to - just do it when you can.
d) Get in a good church. Another old classic but it's still as true as it's ever been. What's a "good" church? One where you feel comfortable, where you feel you can get and are getting closer to God.
e) Find some Christians who you can get along well with and who you can trust. Hopefully some people at your church fit this description.
f) Read other books about Christian issues - books by Christians and books by non-Christians. (Christian issues doesn't have to only be things talked about at church - it's useful to read non-church books about non-church issues which happen to be relavent to your life right now - but always read in the light of the bible and try to discuss what you read with trusted Christian friends.
g) Keep praying! Pray before and after you read, before and after you sleep, before and after you eat, before, during and after church. Pray during the day, pray at night, pray at work or school, pray at home. Talk with your God!
Got any more ideas or comments on the above? Let me know!