Thank you for your comment, and for favouriting my work!
As for simple tips, I'm not so sure!
I'm not an Scott Hansen expert, but you have a really good range of photos in your gallery perfect for you to experiment and adopt the ISO 50 style, I guess my main suggestion would be to find as many textures as you can of pages from old books, to rust -- absolutely anything to layer over your photos, experimenting with the opacity settings to acheive a distressed aged effect on your photos using Photoshop.
It also doesn't hurt to muck about with tonnes of colours and add your own shapes to your work, I think ISO 50 has used a similar range of colours in all of his work to make his style more recognisable.
I found a tutorial written by Scott Hansen, just click on the link;
[link]I hope it helps! Oh and Welcome to DA
Hayley x