Today I Learned something, and I want to make a Public Service Announcement: you can create a link that pre-populates fields in Jira before you submit them!
If your server is jira.example.com, then you can use `CreateIssueDetails!init.jspa` with a URL that has the different fields in it.
For instance:
Would create an issue with summary "Please enter your ticket summary" in the project whose `pid` is 1234, of the type encoded by `issuetype=2`, and values for the custom fields encoded by 11011 and 11013 with the options set by values 1011 and 12013, respectively, with the priority encoded by value 5.
You need to find the values for those options custom fields by looking, for instance, at the XML export of a ticket you want to use as template.
For instance, if there is a ticket https://jira.example.com/browse/EXAMPLE-1, you can export it to XML, and look for `project id`, and the number after it is what you have to put after `pid`. Then look for the name of other custom fields, and use the content of the `customfield id` that provides it, and equal it to the value of `customfieldvalue key`.
And for priority, use the value after `priority id` that matches the priority that you want.
Hope that's useful!