This is a good wheel for someone who can regularly pick a key number that comes in but has no idea of what the other two digits will be and only wants to spend a few bucks per draw.

Select your key number first.  Then pick a sequence for the 0 through 9 digits.  This can be done by picking the digits out of a hat, using shuffled cards,  (I use a random number sequence generator).

 http://www.random.org/snorm.html

Keep track of the sequence that the digits are picked.  Then find your key number in that sequence.

For example, your key number is '2' and your number sequence comes up 5-1-4-2-7-0-9-6-3-8.

You put your key number in the 1st, 2nd and third position combined with the adjacent numbers in your sequence.

In this example you would play 270-427-142.

The advantages to this is a) your key digit is in each of the three positions, b) your key number is paired twice with the same digit in two out of three of your combinations, c) you are covering 5 digits in the wheel using only 3 combos, d) if your key number comes in, you've lowered your odds tenfold.

This wheel is for singles and should be played straight/box.

The sequence could be modified in many ways to suit your purposes, such as hottest pairings with your key digit, etc.

Good luck with it!