1.Thought & Dialogue
Thought and Dialogue are important to make it so they're different from the rest of your posts. Generally people use italics and bold for this.
Example-
'Gee, I hope this will go well' She thought to herself.
"Do you think this will actually work?" The girl asked

See? It's easy to tell when she's talking and thinking in comparison to the rest of the post.

2. Personalizing
You can use font face, size, and color to personalize your posts and make yourself more memorable.
This is generally a good idea, but keep our eyes in mind when you decide what kind of post you want. Don't make it so tiny you need a magnifying glass to read, or a color that doesn't look very good with the background.

3. Color
You could just use the basic colors like 'red, yellow, purple, orange, blue, and green'- but those get boring.
This site has more hexadecimal colors-
Web Safe colors, smaller chart