Use databases and resources that provide information about journals to identify some titles that match your topic.
Use databases that provide some evaluative component about individual journals.
Use databases to find where others publish articles similar to yours.
Use databases such as PubMed to see where articles matching your topic tend to be published.
Avoid disreputable and identify reputable journals
Use free databases to find information about a journal's position on open access.
Use online lists of journals categorized by the way they address NIH Public Access Policy requirements.
For help with NIH guidelines, copyright and more, check out the resources listed below.
Consult relevant literature on how to plan effectively.
Here are some useful examples:
The UW Libraries provides support for authors who publish their work in open access journals.