Trying to come up with fresh ideas everyday will probably be the hardest part of any 365 project, so far I have been lucky as I have loads of things that I want to try.
What I have found so far to be useful is my notebook that goes everywhere with me, I normally make a quick note at the time and then fill it out later.
Take photos of subjects as a reminder.
Don’t ditch old attempts that haven’t worked out, put hem into an ideas folder for later, you will get better as the project progresses so you will learn the skills or become more proficient to pull off some of those earlier shots.
Join groups, sites, communities that are dedicated to these projects like http://365project.org/ http://dailyshoot.com/, http://www.facebook.com, http://www.iheartfaces.com/ or http://www.flickr.com/.
Don’t be afraid to try to shoot photos that you have seen, but try to put your own style into it.