Some stuff to consider/ ask yourself ...
1. Are you exhibiting to sell your prints, or publicise your name, and skill? This would help you determine the kind of prints you'd show.
2. Do you wish to exhibit by yourself, or do you want to do a group or duo show? Working with a partner or in a team can help cut down on costs and get more work done.
3. What's the theme or subject matter you wish to exhibit? Like Stefen said, having a strong concept is important. If you are able to 'sell' your concept, that would be useful when it comes to approaching and convincing sponsors.
4. What kind of space do you want to exhibit in? Don't limit yourself to just traditional gallery spaces. If those turn you down, consider shopping malls atriums or walkways that host visual art exhibitions, or even the art schools, or the libraries. Visit these spaces and see what kind of stuff they show.
5. When do you want to exhibit, and for how long? Most spaces and sponsors need a few months' advanced notice. 6 months is a comfortable amount of time for you to do your research and plan.
6. What size are your prints? Do they fit well in your exhibition space? How are they to be mounted or framed? If you are selling your prints, determine your price range.
7. What kind of sponsorship are you looking for? Sometimes sponsors respond better when you can tell them your long term plans, and the kind of support you are looking from them. IMHO, it's better to look for a sponsor (eg: printer, equipment, exhibition space) you're comfortable working with, and are willing to build a working relationship with, than with someone who gives you the money, but is nasty, and makes you feel obligated to them.
8. What kind of publicity do you want? Do you need namecards to be made? Posters? Booklets or brochures? Where can you place them? Is there an opening event?
Lots of stuff to think about, but once you have it all sorted, it gets easier. Good luck!
