Bruce has a good one in item 2 about being able to tie things together with the problem list.
At one of the user conferences I proposed an idea that was similar, and maybe more powerful.
I asked for "magic buttons" that could be attached at will in the chart, which would allow all of the items with that button to come up on one screen.
Let me explain:
A key sequence, lets say Alt A would be a 'magic button' which could be attached anywhere you typed it. When attached to a problem in the problem list, it would link all of the other items with "Alt A" and allow them to be summoned up on one page. (like paper clips or post-em notes in a chart that you are preparing for a deposition or a case report). You would tag COPD 496 and also CXR, Spirometry and the one consult from the pulmonologist that anything meaningful in the body of the note. The same patient might have a history of breast CA and "ALT B" attached to that DX and the Mammogram, Path report, Oncologist's consult and AGAIN the CXR.
Click on the icon for "Alt A" on your Med History and all of the Pulmonary bits show up. Click on "Alt B" and everything you have assigned to Breast CA shows up for a quick run through, even if it is shared with another DX like COPD.
A patient with renal failure might have "Alt A" for Med History CKD stage 3 and when you click on it you see all of the eGFR's that you have selected. And maybe also biopsies, ultrasound's etc.
I think this would save a tremendous amount of time for weak minded people like myself who can't remember exactly how bad was that breast CA 5 years ago, and is the shoulder pain today tendonitis or should I be looking for Metastatic disease first off.