We know how difficult it can sometimes be to come up with just the right words  for your gift. Below are some suggestions, by occasion, to help express those sentiments.
Please feel free to use, add to, or borrow the entire phrases.  

Sympathy
Congratulations
Get Well 
Thank You
Sorry/Apology

Sympathy

May the sympathy of those who care make the sorrow of your heart less difficult to bear

Our thoughts are with you in this time of sorrow

May the love that surrounds you be a source of comfort

May our sympathy help to comfort you

May you find comfort in knowing that we care

It is with great sadness that we learned of the death of  ………  We shall miss him/her

We are sadden by the death of ……., you have our most sincere sympathy

With great personal sorrow,  I extend my heartfelt sympathy

Sending you love to give strength to bear your sorrow

We are grieved to hear of your loss, if there is anything at all we can do to help please let us know

When there is love, any life is too short, we know you are grateful for your life with …… and we feel fortunate to have known him/her

Congratulations

Congratulations on your (promotions, sales achievement, securing the account, a great job well done) & best wishes for continued success!

Congratulations on your anniversary! May the past memories be a prelude to future happy memories! 

Let me offer our sincere congratulations! I wish you success in your new office, home, location, etc. 

Congratulations on your marriage, We wish you and the bride/groom a full share of happiness in the years to come.

Get Well

Thinking of you during this time, take it easy and enjoy the rest while you can.

Sending our wishes for a fast recovery

We hope this gift will brighten your room in the hospital and cheer your spirits

Please accept our best wishes for a speedy recovery

Please accept this gift with our sincere wishes for a fast and complete recovery

Thank You

A heartfelt thanks

Just a small thank you for your recommendation/referral.  I sincerely appreciate your help.

I wanted to express my sincerest gratitude for all you do!

This gift is just a token of how much I appreciate your ….

Just a thank you for being a customer this past year…we appreciate your business and hope to continue serving you.

Sorry/Apology

(All the phrases below can be followed up with –please accept this gift)

Please accept this gift as a token of an apology, and rest assure that nothing similar will occur again

I was wrong, I have no excuses, I am sorry,

We apologize for the error,

We appreciate your patience during this time,

We regret that we missed the meeting, let’s reschedule, in the meantime please accept this gift

This is an apology I feel embarrassed at having to make,

My apology at this time cannot undo past damage, but my regret is sincere, …

We are sorry about the error and hope that it didn’t cause any great inconvenience.

You are certainly justified in being frustrated about our blunder, please accept this gift and accept our apologies

OOPS! We GOOFED!!