Geograph - photograph every grid square

There is a link at the foot of your profile 'Uses: Use of my photos around the site'. The first tab on the page is to 'Featured Images' http://www.geograph.org.uk/myphotos.php?tab=featured which will list any which have been used as 'Photograph of the Day' and show on which date they appeared on the home page.

In the line of links just below the credit line on the photo page are one or two yellow 'thumbs up' icons. Just one, which says [👍🏻 Like] if there is no description. Or one saying [👍🏻 Like Image] and another with [👍🏻 Like Description]. You can also find the 'Like' thumbs on the 'Full listing + Links' format of the photo search under 'Thumb'.
Click on one or both to show your appreciation.
When this happens to one of your photos, it is reported on the section of your profile 'Use of my photos around the site'.

Use the keyword
points:tpoint
in a search of your own images (easiest to do from your profile page).

It's essentially the most viewed - weighted so length the image been on the site is taken into account and deduplicated so only one from any shots taken same day. The alternative selection is different, in that it carves the period up into a number of periods (by submission date!) and then just displays the most viewed in that period. For more info see forum thread.

Click the link 'Use of my photos around the site' near the foot of your profile page.
Follow the link at the top of the page you arrive at to get notification emails of new additions in selected areas.

All photo's that have been moderated and accepted are eligible for Photo of the Week (PotW), so long as they are uploaded by the due date for each week as follows:

The PotW weeks run from Saturday to Friday, and you need to upload by midnight the following Tuesday. So e.g. If Saturday was the 1st of the month, you would need to upload anything taken between the 1st and 7th (inclusive) by Tue 11th. NB the important thing is not the dates but the days.

If you wish to avoid your pics being in the PotW, the easiest way is to wait until the due date has passed and then upload.

The photo of the year is selected from those pics already awarded PotW.

Absolutely! A photograph that doesn't fit the strict "Geograph" criteria can still be a valuable contribution to the project. This distinction isn't a judgment on the photo's quality or its value. We encourage you to submit such photos, and if you have questions about how a moderator has classified your picture, you're welcome to ask for an explanation.

We ask you to select an approximate subject location on the map, which is the location of the primary subject of your photo (if there is one!). This could be a small feature like a building, or a large one like a lake or mountain (in which case you'd select its approximate center).

If your photo is very wide-angle and you can't pinpoint a specific subject, you can select something in the foreground.

For truly wide-angle photos (like 360-degree views), it's generally best to leave the subject location blank (just using a 4-figure grid square reference) and focus on accurately specifying the camera location.

The "range" between the subject and the camera somewhat defines the field of view, though it doesn't need to explicitly match the technical field.

To help us build a long-lasting and useful archive, we ask all contributors to license their submissions under a Creative Commons license. This ensures that:
Geograph can freely distribute the image.
Nearly everyone can freely use the image with very few restrictions (for example, children can use the images in their school reports).

We understand that it might feel like "giving away" your images to some extent, but we hope you'll agree it's a worthwhile sacrifice for the benefit of this collaborative and publicly accessible archive. You can learn more about the philosophy behind this in our Freedom - The Geograph Manifesto (linked below)

While it's fun to get out, take pictures, upload them, and track your progress, Geograph also has a serious side. Our archive is increasingly recognized as a valuable research resource for both now and the future. Therefore, carefully choosing an appropriate title and adding detailed information in the description will significantly increase the value of your picture to others and help them locate it in searches. Descriptions can include links to other pictures on Geograph or to outside sources.

Although we don't insist on a detailed description, it's fine to leave it blank if don't have anything to write about

You can upload images of any dimensions, portrait or landscape, but the file size needs to be under 8 megabytes. We do resize them so their longest dimension is 640 pixels on the main photo page. Optionally, you can also release larger versions of various sizes for downloading and re-use.
http://www.geograph.org.uk/article/Larger-Uploads-Information

We only accept JPEG encoded images. If you have any image in another format it will need to be converted.

Ideally images shouldn't have a longest dimension of fewer than 480 pixels. While we might accept such images if they hold particular interest, we would really prefer a larger image.

We do record the EXIF headers from your original image, so it is advantageous to upload your original camera image or use image editing software that maintains the EXIF data if you want this information to be kept (but we don't currently make use of the data).

Actually I like Photoshop. It IS expensive, but you can purchase cheaper versions of it which are perfectly capable. It does take a little time to learn, but if you can master the keyboard shortcuts it helps a lot. It really can do everything - from HDR to 3d painting.
There are loads of Image editing applications, including the free one GIMP. Its personal preference. GIMP is very capable, but I'm not personally keen on the interface, even if it is a bit like Photoshop. It also runs on Linux.
In windows, its useful to have the application set up so that a right click on the image will launch the application, or open the image in it.