This is coming from a former electrical lead and CSA.
1. Read the robot rules within three days of kickoff (don't post question to CD unless you have read all pertinent rules). Read to understand. After each rule think about what the ramification of the rule is and why the GDC included it.
2. Read any source you can find for the hardware you are using. Read the
screensteps, manuals for the electronics, including the batteries.
3. Read the team updates and Q&A. This takes less than 15 minutes twice a week, it is worthwhile to make sure you understand the rules and the changes. Again, read to understand.
4. Keep everything organized. I think the thread has hit this enough.
5. Do an inspection check at the end of the season. Go through the inspection checklist (posted mid to late build season), preferably with someone else. Make sure to pay attention to the power routes for the radio, RoboRIO and PCM (if you are using it).
6. Check with your mentors/other team leaders to make sure the electrical system is properly represented on the BOM/CAW. Make sure to check the rules (and Q&A) about if items from the kit need to be listed.
7. Make sure all connections are secure. Push down on the red and yellow fuse in the PDP (I have pushed them until I had an imprint of them on my finger and the lexan the board was mounted on was bending and still not had them in all the way).
Always remember that you are working as part of a team. You cannot succeed unless the rest of the team does as well. It can be helpful for you to nudge other sections of the team and remind them of things they may not have noticed or may have forgotten. Commons items include creating the CAW, updating firmware, changes that were made in team updates and reviewing the inspection check list.