How to make good use of a small startup fund

I'm starting a tenure track position (in the US, computer science) in fall and the position comes with a startup fund that is insufficient to employ any (postdoc) staff and PhD students are funded directly by the department. Also, my conference travel is taken care of by other funds.

How can I use the (limited) funds that I have to benefit my career?

Edit: I'm mostly working in theoretical research (algorithms).