People can appear to store more information in short-term memory by chunking it. Recall from short-term memory is generally easy and but items are not recalled equally well. The primacy effect - things earlier in a sequence are more likely to be remembered. Recency effect - the most recently presented information is also more likely to be remembered. However, noise and other distractions interfere with rehearsal and can cause forgetting.
Checklists are another way of helping people to retain items in short-term memory.
Checklists are frequently used in human factors to make sure that all the many possible issues associated with human requirements are actually addressed. Long-term memory is a more or less permanent memory store. It contains items of information that have not been in consciousness for some time, but are recalled as needed. Recall fron long-term memory requires an active search process which may be drawn out and frustrating. When items are found, they are transferred to short-term memory for conscious use.