Here is a little strategy I use for playing the daily number. It is based on the Massachusetts 4 digit daily numbers game which allows betting 25 cents on first or last 3 exact. However, you can adapt it to any daily numbers game in your state or country.
Pick your 4 digit number. Bet 25 cents first 3 exact and 25 cents last 3 exact. Play the number for a week. (7 days) Cost $3.50
If the number does not come out the first week, play it again for another week only this time have the lottery agent run the card through 2 times. cost $7.00
If it does not come out, play it again another week only have the agent run the card through 3 times. Cost $10.50
Again, if it does not come out, play it again another week only have the agent run the card through 4 times. Cost $14.00
You get the idea. Keep continuing this process.
Although it can get a little expensive the payout will be significant, especially if you play a double digit. In addition each ticket will be cashable (in MA anyway) without a trip to the State Lottery.
Good Luck!