Stu i normally do 4 sets of 10-15 reps on all these....

Flat bench
Decline bench
Incline bench
Flat flys
Incline flys
Chest extension
Cable crossovers

All with db's and going up to the max in the gym which are the pair of 60kgs...

Nicely warm'd up of course before hand and always fail in chest...

If you need to exhaust tri's this is my normal work out, again 4 sets of 10-15 reps..

Weighted dips
Skull crushers
Rope pull downs
Single db behind head dips
and finish with single hand reverse cable pull downs...

Keep at it mate it will come in time....

Will say tho you looked well in the photos of the night out you had...in a completely non-gay way.........LOL