Car Trouble

I was starting my car to leave on some errands, and was started to find it making a funny clicking sound and not wanting to turn over. I tried a second time, and this time just left the key turned and slowly I started to get the sound where it's trying to turnover, and eventually it did turnover and start. I let it sit for a few minutes, then turned it off and tried again, and it again made the click sound but started up without much trouble, so I went ahead and backed out of the garage and did my errands.