Enhance existing solutions

Start looking around, especially in the Z-Files and the Z-Wiki (there are so many more things to be completed). Or just use the search feature to search for “possible enhancements”. If there is anything that you really want, and you really cannot (or do not want to) wait for a specific enhancement, just consider submitting an appropriate Z-Bounty.

Create new solutions

Another possibility is that you have requirements or requests that are even not mentioned anywhere (yet ...) within Dr.Chgman.com. In that case start with getting it documented as a Z-Issue or some type of Z-Wiki publication.  It is well possible that the issue has been addressed already somehow via a specific customization or approach. In that case you may expect the documentation (the clue) of such customization to appear in the Z-Clues also (probably soon, if not just submit a Z-Bounty to get that addressed faster). And last but not least, you may consider submitting a Z-Bounty to even get the actual solution delivered as part of the Z-Files.