There's a few key tools that I always have on my desk when making cards. These are the items that I use so frequently that they simply don't get put away.
Crafter's Pick works great to glue down ribbon and embellishments. It dries clear and is very easy to work with.
Fabiano Paper is beautiful paper. I could easily make every card using this paper. It makes such a statement that you don't need to add much else. That's why I probably love to use it.
Fresh Ink is an exclusive ink that is sold at Impress. It's a pigment ink and the colors are amazing.
This alphabet set stamps very nicely on all types of paper. I like the packaging because it makes it easy to use and is nice for keeping the letters all together.
Piercing Tool. I've used this for several years and is great for making very small holes and for several other little tasks.