As you all know valor points earned per week are capped to 1250.
Doin a daily heroic 50 points under valor cap yesterday i noticed i got 70 points and not 50 that would get me to cap.
So with a bit of planing you could get up to 80 extra valor points (if you are raiding 25mans) each week.
A bit of math is needed to cover what option suits you well (depending on your guilds raid schedule).
A common situation is guild downing farm bosses on last day before reset. With a situation of less than 10 25man bosses downed before 6th day of week you will have:
6*70 = 420 points from heroics leaving 830 points to be earned through raids or last heroic. Now if you dont do 7th heroic you can get to 1230 points with downing 9 bosses in 25man. (420+9*90 = 1230). Next income gets you to cap but you go over it, so if you down a 25man boss you earn 1320 points that week, 10man boss or 7th heroic gets you to 1300.
If your guild is doin 10mans only you really cant get much more extra from it since 70*18 = 1260 so only extra 10 points and nothing to do to plan it.
Unfortunatley i didnt screenshot when i got the points from last heroic, since i didnt really see it coming but i saw i have extra points from what i should have.