How many ways are there to say thank you? I'm not talking about the many different languages, although putting together a nice graphic with those two words as they are said in other tongues can be a lot of fun and I'm sure would be pleasing to the person you are thanking. What else though? What can you do to convey that you are actually grateful for that something you have received?
We give thanks at different times for different things. Sometimes a polite courtesy is almost taken for granted, but when somebody hold the door open for you or pulls out your chair or refills your water glass, say thank you. When you receive a present or money, then most certainly thanks should be offered. How about when you ask for someone to help you with a project? Let me just say there is never a bad time to offer thanks.
You are an awesome caring person and I'm sure you want folks to know you appreciate those things they do on your behalf. Let it be known then! Let them see your happy dance! Notes are always nice too. I know many have fallen away from the habit of writing personal notes, but the most awesome people I know still write them (David, Zoe, Jack) and it means a lot. Say thanks though it they way that works best for the particular occasion, but say it!