Counting the Omer - middot of Malchut
Shavuot is the day Hashem revealed himself to the entire nation of Israel assembled at Mount Sinai and gave us his Matan Torah.
All of our holidays/festivals are called a moed. A moed is a meeting place. These are days we can "meet up" with Hashem. These are days that give us spiritual energy - Not physical energy by giving us days to rest and not go to work. These are days to tap into the deep spiritual energy available in the world. We should learn Torah, daven, say Tehillim. Shavuot is the day Dovid HaMelech was born and the day he died and he wrote Tehillim. Find a way to bring down the sparks of holiness and have them come inside of you. Do what you can do to feel spiritual. Talk to Hashem, he is right there. He spoke to us on Har Sinai, so why cant he speak to us now?! But if you want him to speak to you then you have to open the conversation. He will talk back to you, you just have to start .