I took this from islamweb. Just a few notes I wrote down from an article titled "practical steps toward sincere repentence" which you can find here
http://www.islamweb.net/eramadan/art...ere-repentance1. In writing, count the sins you have accumulated since adulthood to the present time
2. In writing, count blessings of Allah among you.
3. Repentence prayer: two rakats of prayer followed by seeking forgiveness
4. Preform daily acts of worship
5. Attend weekly lectures at your masjid
6. Know and understand your poverty is only in not knowing your need of Allah so seek to understand how much you really need Him
And the following prayer was offer on the website that I will share as its very uplifting:
I entreat You by Your strength and my weakness, by Your richness and my poverty to pardon me….
Here I am, the wrongful and sinful slave, before You… You have many slaves other than me, but I have no Lord but You…
I have no shelter other than with You, as there is no escape from You, except to You….
I ask and entreat You, as I am humble, poor, frightened and blind…
I ask You while I am surrendering completely to You, and weeping out of fear of You…. to pardon me...