The first week I tried various homemade concoctions - baking soda in water, diluted apple cider vinegar - which I had read about, but I found these to be a bit of a hassle and they didn't really make my hair feel nice. So I quit them too.
What do I use, then, you ask?
Just plain old water!
I still wash my hair daily, I just don't use any products on it. It's made an amazing difference! Where my hair in the past has been thin, lifeless, and I couldn't grow it beyond my jawline because it would just have no body to it at all, it's now full and lively and Mr loves it... but don't take my word for it, here's some visual proof:
|Before. Quite flat.|
|'After'. Well, current. Not flat!|
It's been the best thing I've done for my hair, and the biggest change in what I look like, in a very long time. I can't say it has made my morning routine easier or shorter, as I still shower and wash my hair daily (just without any products); or that it saves me much money, as shampoo really hardly breaks the bank... but I love being able to have long hair - and Mr much prefers that look too.
A note of caution: it may take a few weeks for hair to get used to this. Mine took perhaps a week and a half before really loving life without shampoo, but people are different. I've read some people take up to six weeks for their hair to start looking nice, rather than greasy or unkempt, after changing away from shampoo. Also, my hair was thin and flat - I have no idea what this might do to thick or curly hair!!
Give it a try if you like... any questions, I'll try to answer in the comments!