Here's what to look for:
According to the American Web Media website:
-7 in a row of the same number like 29999999
-7 of the same number 99990999-Super radars like 01111110, 10000001, or 80000008
-Repeaters like 67676767
-Double quads like 11110000
-0 and 9 binaries like 00090000
-1 and 8 binaries like 81188118
-And more!