How to get the Holy Spirit of God

After JESUS was risen from death, he appeared to His disciples in 
Jerusalem in the evening of the first sunday and explained to them:
And I shall send down to you the gift my Father has promised. Stay in the 
town, until you will be filled with the Power from Heaven. Lukas 24,49

That means: Stay in communion with Me and with eachother, meditate and 
follow My Words, pray together and ask Me and My Father for the Holy 
Spirit, and after some weeks, if you are prepared enough, I shall send the 
Holy Spirit down to you.