This guarantees nothing but improving your odds a bit:
1) There are 55 white balls, split them into two halves, numbers 1-27, and 28-55. Now pick two numbers from one half, and three numbers from the other half. About 68 percent of the games are 2/3 or 3/2 games.
2) Were the last two games 2/3 or 3/2 ? Odds are against three games in a row of the same type, so if the last two games were 3/2's, do not play a 3/2. If the last game was an 0/5, 5/0, 4/1 or 1/4, do NOT play the same type again, those four types of games generally do not repeat in-a-row.
3) Powerball - were the last two or three powerballs-in-a-row that hit odd or even ? If so, play the opposite. They have been known to hit 4-5-6 in a row, but usually it's just 2 or 3 games in a row.
PM me if you want to discuss things in more detail, I check my PM's about twice a week, so don't expect a reply the same day.