Lots of the magazines have opportunities for 'fillers'. These can be letters to the editor, household tips, funny anecdotes, cute pictures of children or animals, rants or opinions, jokes ...
Writing these can be a good way to practice 'tight writing' and teach you to stick to the point. As fillers are submitted online or by email, there's nothing to lose, other than a few minutes of your time.
Having one published and therefore seeing your name in print and getting paid for a piece of writing is also hugely motivating, especially if it's your first acceptance, or first for a while. I know this because I wrote loads when I started out.
If the magazine also publishes fiction, or it's one you might like to write an article for, then creating fillers is a great way to study the market.
Have you ever written fillers? Would you like details of the opportunities available? If there's sufficient interest I'll do a regular feature with links or email addresses.