i always do the team talks and have had really possitive results so far

seems logical that motivation would be key to a good team talk though...
i opt for 'you can win' if im favourites, 'wish lusck' if i think i might struggle, 'for the fans' if its against rivals etc.
half time you need to be paying more attention to how the players react to your talks in the ass man advice tab...if a players at a rating of 6 he may react better to a kick up the ass or encouragement depending on what kinda personality he has...if a players at 8 i say im pleased, 9/10 delighted and if its all round 6/7's i encourage or say im dissappointed depending on the score...my best example was 1-1 at half time against villa and won the game 4-1...also get a few possitive commentary's on the team talks