Here is a strategy I used to follow:
(The bet is only in color red or black whichever you prefer to be lucky)
$1 if lose (if win then again $1 and continue)
  $2 if lose (if win then again $1 and continue)
    $4 if lose (if win then again $1 and continue)
      $8 if lose (if win then again $1 and continue)
        $16 if lose (if win then again $1 and continue)
          $32 if lose (if win then again $1 and continue)
            $64 if lose (if win then again $1 and continue)
              $128 if lose (if win then again $1 and continue)
                $256 if lose (if win then again $1 and continue)
                  $512 if lose (if win then again $1 and continue)
                    $1024 if lose (if win then again $1 and continue)
                      $2048 if lose (if win then again $1 and continue)
Keep going with 2x every time you lose once you win the start over again with $1

Now instead of $1 you can multiply your stake with whatever amount you want. Higher stake means higher return and also higher risk. Make sure you have enough money to cover at least 12 stage. And of-course you need to find a table which does not have a limit.

I really do not find anything to sell here. It's amazing how people try to find out business from everything.