MTT's have a lot on concept that you need to know. They are different to SnG's and Cash Games. What I found useful is my ability to play heads up in MTT's. Most players can't play heads up that well, but I do it a lot, so I can beat players in heads up matches a lot even with a 2:1 disadvantage.
A good strategy I used was to play four handed and slowly go up. So then I played single table six handed SNG's, then single table nine handed SNG's, then two table SNG's, then three tables, then five all the way to as high as I could go (which was at the time 180 man SNG's).
Just to point out that most of the money is made in the top three in an MTT, so you need great short handed skills (like I had). So practicing the way I did was great. But what I was clumsy enough to do was use all my bankroll up, so I had to start again.
Good luck with your attempts!