This is the main grind of this game. If you have a turbo controller, you can grind towards this while you sleep/work/whatever, if not, you will need to sit and hit every few seconds for many, many hours. Set up a game with the following settings:
Game Format: High
Betting Limit: No Limit
Players Per Table: 1
By continually hitting , you will play every hand down to the river (all cards shown), which increases your chances of getting hands towards the other achievements. After the tournament is finished, you will go straight back into another one. This will take a very long time to grind to, however using this method makes it a simple achievement. You can view how many hands you have played by going to Help & Options > Career Stats.