Consider the normal tick tack toe game, but this time you have to AVOID getting 3 in a row in any line. Is there any strategy you can tell me that will make sure the first mover doesnt lose. Thanks

There is not an exact square that you could be sure you'd NOT get three in a row but by gaining the knowledge the first move your opponent makes, you have a higher chance of NOT getting three in a row, the closer you mark your variable to your opponents, and the further your second move is away from your first move (i.e. you want your opponent to be in between yours if possible). In a very obvious way to see it, the simple strategy is to lose the game in order to "win."