I recently used some of my Christmas money and got a ND Filter (ND=Neutral Density), which allows me to do some long exposure shots during the daytime. I'm loving it!
There's something about trying new things that is always fascinating. The first time I went up into the mountains in my jeep was definitely fascinating.
If you've been in a rut lately, try something new. You could even go back to older ideas, dust them off and give them another try. Who know's it might get those creative juices going again.