it is a long time that I have discontinued my studies.but now I again want to continue it probably by doing mba(IT) or PGDIT. How to do it ?

if u r a working professional you can do this through distance education from SMU or PTU.If you do it on regular basis then threre are lots of institute offering this course

no need to worry you can start your study at any point of time but you have to devote time from your busy schedule