There are many different ways to save your seeds, so it is worth checking some of the published information, either online or in a book, to see how the experts recommend dealing with each type of plant.
Don’t be scared to give it a try - you’ve nothing to lose!
Here are some online resources to try:
This blog has masses of gardening information. You might need to search a bit to find the entries on seed saving, but the instructions are easy to follow.
An online handbook, quite simply produced, by some one identified just as ‘Jack”. Some detailed technical information on seed isolation distances and breeding your own varieties.
By The Real Seed Company. Lots of info on vegetable seed saving, but possibly a little technical for the complete beginner.
Some information on saving flower seeds.
Some books to help:
Back Garden Seed Saving: Keeping Our Vegetable Heritage Alive [Paperback]
Sue Stickland (Author), Susanna Kendall (Illustrator), available from Eco-Logic books: http://www.eco-logicbooks.com
Complete Guide To Saving Seeds, The [Paperback]
Robert Gough (Author)
There are also a few tips on these pages. Some of the most straightforward are covered here, to help you get started.