You can use the resources below to perform a Vishnu Homa by yourself with Vishnu sahasra naama stotram. Homa or havan is a Hindu fire ritual.
Download a Vishnu Homa manual (version dated 2009 June 11) with mantras in Sanskrit, English, Telugu, Kannada, Tamil or Malayalam. The instructions are in English in all manuals, but mantras are written in various languages. This manual explains the details of a quick 30-minute Vishnu Homa procedure. Several options are suggested for the main mantra of pradhaana homa. It is simple enough to perform daily or weekly or monthly.
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Download the quick reference (cheat sheet) containing only mantras in Sanskrit, English, Telugu, Kannada, Tamil or Malayalam. These documents contain only mantras. One should first download the full manuals and learn the procedure. After one becomes comfortable, one may want to just print the quick reference and do homa using it.