Try thinking of some practical ways in which you can apply the Peg System to things that you would like to remember. Anything which you need to remember in a numerical or 'keyed' sequence can be memorised quickly and effectively by applying the simple principles of the Peg.
If the items you wish to remember are abstract or intangible, then you simply form Substitute Words or Phrases for the items, and associate them to the relevant Peg Numbers.
For example, the list of English counties which you learned by applying the Link System could easily have been memorised by applying the Peg principles. To remember that the twelfth largest county is Cornwall, you would simply associate Cornwall to Peg Word 12, which is tin, and so on.
Incidentally, if you are worried about the ludicrous pictures staying with you forever, running round and round in your mind, don't be. One of the best things about the Peg System is that it is simply a means to an end. Once that end has been accomplished, the means simply fade away and disappear - they are no longer necessary.
When the information you have memorised is used a few times, you will know that information. What you will not remember are your original ridiculous pictures. For this simple reason, you can use the same set of Peg Words over and over again, as many times as you like!
Also, there is no limit to the number of Peg Words that you can use. To extend your set of Peg Words beyond 100, simply choose words which fit each number phonetically. For example, the Peg Word for 101 could be Dust; the Peg Word for 150 perhaps towels; and the Peg Word for the number 500 could be laces. There really is no limit to how far you can extend the Peg Word idea.