Useful expressions to say congratulations.

May god bless you with many more successes.
Please accept my heartiest congratulations.........
I convey my heartiest congratulations to you for..........
I rejoice with you and send my heartiest congratulations for.....

Useful expressions to say Good Wishes.

I convey my warm wishes for.......
I convey my sincere wishes for.....
I convey my good wishes for.....
I convey my sincerest good wishes for ...
I take this opportunity to convey my best wishes to you.
I take this opportunity to convey my good wishes to you.