d4veg wrote:I wonder what a reasonable amount of kanji could be learnt a day. 20? 40?
It really depends on you. You may have already realised how many you can handle in a day. For a lot of people, it seems to start off very easy (100+ is possible), and then they have to be more realistic (50 or less). Be sure to download the Heisig deck for Anki and review as you learn (check File > Download > Shared Deck). Heisig's technique is very powerful in helping you remember, and SRS practically guarantees you won't forget anything.
d4veg wrote:I still do not have the greatest technique in my learning. Is vocab best learn using Anki decks with sentences to give meaning of the vocab? or would strictly memorizing the vocab by itself by best? Possibly a mixture of both example sentences and plain vocab cards?
The specifics depend on you, but not including some sort of context is a very bad idea. The majority of people seem to have a kanji sentence as the question, and the furigana and definition of the keyword as the answer. Personally, I feel it practically gives away the meaning of words, so I have the word by itself, and include the definition and 2-3 example sentences on the answer side. Try experimenting.
d4veg wrote:I have also checked out anki decks that only have a listening component and I must reproduce the sentence. Should I also write the answers out with a pen and paper for extra practice for each card? Hmm...
This is again up to you. You'll want to include audio for your vocabulary cards where possible so you can learn the correct pitch accent. The model you've mentioned here, however, sounds very time-consuming. It would also be pretty pointless if you'd already developed listening skills. SRS is unquestionably something you should spend regular time on, but it also takes away time from gaining exposure to natural Japanese or other studying, so you need to find a balance.