Here is my opinion on each of the items you are in:
I am not a fan of directory submissions.
3-5 guest posts is a good idea as long as the site you are submitting to has a lot of traffic and isn't super spammy with other guests posts.
I am a fan of local business directories - it will help you in your local footprint and will allow you to build some authoritative links.
Forum and signature backlinks are abused and overused. The only time I would actually consider using this is if the forum site actually provide you leads (For example, a business message board, marketing forum, business community)
Squidoo Lens are now No Follow and also contain a ton of spam. I think you would be better of building a blog on your website and building original content there.
I still think there is value in blog commenting as long as you are providing diverse anchor text and valuable non spam links.