@Lisa46 There is a warning notification letting the player know that the elder is very tired/over exerted and to continue the activity may result in death. I can't remember the exact warning now, but there is one. Also the elder will get an over exerted moodlet and be very uncomfortable, similar to when you push your elders to work out.
I noticed the moodlet, I just didn't think it would actually do anything! I'm still trying to figure out all the new features in sims 4.
Some actual tips:
1) The easiest parties (in my opinion) are Dinner Party, Birthday Party, Date, Wedding, House Party, and Venue party. For a dinner party, just make one meal and three mixology drinks before the party. Then it will only take an hour or two to get everything done. For a date, use two sims from the same household who have full needs and have had their first kiss. For a house party, have a cake and three drinks baked. For any party, use the tv to get people in certain moods, and have all your sims help.
2) Take advantage of any mood your sim has to accomplish some wishes for their seventh requirement. I'm only in week two of my main game, and my founder already has this one done!
3) Mixology and Cooking are good skills / aspirations to do near the beginning, since someone needs to make all that party food. You can make Gourmet Cooking the third skill. Aside from that, the only skills you need at the beginning of our dynasty are fishing and gardening. I used a seperate sim for each, but I think I could have used one sim for both. My gardener sim already has what she needs, and both sims are at level seven.
4) Good combinations— Serial Romantic & Soulmate: if you're okay with cheating this works amazingly, since both need a ton of gold/silver dates. Have a few boyfriends/girlfriends, then settle down with one to marry and go on dates with. I paired these with athletic, charisma, and gardening skill. Gardening & Fishing: both relatively easy aspirations. Cooking & Mixology: both require culinary career, so you won't get both done without doing them for the same person.