I'd highly suggest you do a search for the word, "squirting". I did a quick search and there are 727 discussions about this. Quite a few of these threads have many pages of posts and I think that if you read through them, you'd find some helpful advice/information.
Here are just a few of the threads from the first page of the search. Like I said though, you can do a search and you'll find page after page on this topic.
this one has 2 pages of lengthy comments:
more excellent advice given in the responses to this thread:
look at the very first response in this thread: