This tip is primarily for those using Google's blogger, but can be a handy thing to consider for others.
I've been coming across some bloggers lately that have suddenly found that they can't load up more photos! This is because they have come up against the limit of free space on Picasa. The limit stands at 1GB. Which you can think ought to be enough, but if you load up lots of photos without any resize, you will hit the limit fairly quickly. And in this day when people go around with phones and want to be able to upload as they go without any image manipulation, the space will quickly be used.
That's by design though. They want you to buy from them. It costs about $30/yr for 25G. It's a fair price compared to the other offerings out there, but it does cost.
The big photos on blogs are pretty for sure, but they take space, and not to mention bandwidth to download. But if you don't want to lay out money for your blogging, then you have to consider cropping, resizing and reducing the picture quality. It takes time to do these things, I can assure you, but if avoiding paying is your goal, it's worth the effort
Another small tip is if you use the same photos across several blogs, then you can go in and pull up the same photo from your albums without uploading it again.
There are alternatives to using up your blog space though. You can use Flickr to load up pics and then use their interface for adding them to your blog. Think though that if you don't pay for Flickr either, you will only see 200 pics at a time, and you may have difficulty deleting some of them. Plus your monthly upload is capped at 100 MB, so again, if you upload large photos, you will hit the cap fast.
Wordpress offers 3GB of free storage if you run your blog on wordpress.com. Remember though that this will include everything you load up, not just photos. The text doesn't take too much space, but it will add up. The database storage might be included in the 3GB (read the fine print on this), and that definitely uses up some space.
If you are on blogger and want to figure out how to check how much space you have, go to your account overview, then click on Products, then on Picasa Web Albums. There at the bottom in tiny type, you can see how much of your allowance you are using.
If you are willing to pay for your blogging, which most serious bloggers end up doing in one form or another, then you have a wide variety of options to choose from. Take some time to make sure to find the one that suits you best!