Just a reminder when working in graphics and resolutions

As I rework digital tile sets for the Gaming Geeks site, I thought I would throw out a simple reminder to those who work in changing graphic resolution, or mainly those who don't work in it that much at all:

• Always remember it is much easier to work from higher to lower resolution if changing the amount of dpi
• When saving, especially in programs like Photoshop, use the "Save As" feature instead of the Save for Web. Unless your program allows you to change the dpi in the web safe mode, it [saving it in the 'svae for web' feature] will take your graphic back down to 72 dpi. Not fun...
• When increasing a graphic's resolution, I've read the whole uncheck resample image bit and the continual small increment resizing method, and I've tried it. Personally, since much of the digital tiles are line art so far, it has proven easier to take it into another program and vectorize the graphic first with a live trace; and either finish in that program or bring it back to the original program, create a new document and resize the graphic manually. 
• Work in higher resolutions...period. You can always save to a lower dpi setting.