1-) Pay whatever money is needed to Aplix or Simon Lewis so that the MIDP3 reference implementation is open-sourced. Make sure phones manufacturers can get a usable open source VM to run it on.
2-) Write several proper TCKs that run real-life tests, not just cover the width of the API.
3-) Go through the existing JSRs with a fine comb to remove ambiguities and gaping holes in the specs. stop trying to make a single specification fit any possible future device.
4-) Actually enforce phone manufacturers' reponsability to ship handsets without TCK failures.
5-) Work with operators worldwide to establish clear criteria and processes for application certification.
6-) Get Nokia, Sony-Ericsson and Samsung to collaborate on J2ME instead of triplicating all their efforts.
7-) Retain an independant team of existing third-party J2ME developers, big, medium and small so they can keep you on the right path.